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Can Tongkat Ali Cure Erectile Dysfunction And Improve libido?
By Johnathan P Cumberwell
Yes, Tongkat Ali can help you overcome erectile dysfunction.
And it can also increase your sex drive. In fact, it may even take sex to a whole new level. 
But how?
- By increasing your testosterone production
- By decreasing both your cortisol and estrogen production
- By increasing your dopamine production
All of the above will normally improve your sexual abilities.
Let’s learn more about this plant.
Tongkat Ali (Eurycoma Longifolia)
Known also as Longjack and Pasak Bumi, Tongkat Ali is believed to have been used as a medicinal and rejuvenating plant for thousands of years.
It has traditionally mostly been used for headaches, malaria, fungal / viral / bacterial infections, inflammation, and as an aphrodisiac for both men and women.
Tongkat Ali is a medium size tree which can reach a height of about 15 meters. The trunk of a fully grown tree normally has a diameter of 8-10 cm.
It has branches or leaflets at the top of the tree of about a meter in length, and the leaves are about 5 to 20 cm long. It bears clusters of red-brownish fruits of similar size to grapes.
Tongkat Ali is in the family Simaroubaceae and is native to Indonesia, Malaysia, Thailand, Vietnam, Burma and Laos.
The part of the plant that is most often used for health and medicinal purposes, is the root.
A tree normally needs to grow for at least 2-3 years before it can be harvested. One tree normally yields about 1 kg of fresh root.
The elements of the root that are believed to improve sexual functions are the following: polypeptides, diterpenoids, alkaloids, eurypeptides, glycosaponins, glycoproteins, quassinoids, eurycolactone, laurycolactone, eurycomanone and eurycomalactone.
When Tongkat Ali is used as a supplement, the raw root has normally gone through a process where certain of the components are extracted, while others are left out.
Often, the components that are extracted are eurypeptides and glycosaponins.
If one were to get a 50:1 extract, one would get 50 times more of the extracted components, that one would get from a similar weight of the raw root.
Tongkat Ali has been used as an aphrodisiac for thousands of years with many reports of success. It is claimed that ingesting this plant will make both men and women experience an increase in sex drive, and that it gives a man stronger erections.
Legend has it that an elder tribesman ‘Ali’ became ill. Even though his tribe recommended that he stay at home to recover, he went hunting alone.
He then got lost and did not return to the tribe as planned. He did his best to survive in the jungle, and ate what he could find.
And he kept chewing the roots of a short plant he found abundant in the forest.
This plant was Eurycoma Longifolia. From eating it, Ali recovered. He became more energetic and stronger. And after a few weeks he had recovered from his illness, and was able to find his way back to the tribe.
When he returned, he looked younger, healthier and the illness was long gone. He was also as vibrant as the younger men in the tribe, and even took on a new and younger wife.
This improvement in health was attributed to ingesting this plant, and hence the name Tongkat Ali.
Let’s look at how Tongkat Ali can improve your sexual functions.
How Does Tongkat Ali Impact Erectile Dysfunction And Libido?
Perhaps the most important effect Tongkat Ali has on sexual health, is its ability to increase your body’s testosterone production.
Research studies have demonstrated that this happens through two different pathways:
- By increasing luteinizing hormone production and increasing Leydig cell numbers
- By impairing the ability of SHBG to bind to testosterone
Tongkat Ali has also demonstrated an ability to decrease estrogen levels.
And it may reduce your cortisol level. Both the reduction of estrogen and cortisol, may in turn positively impact your testosterone levels.
In addition, Tongkat Ali has also been reported to increase dopamine production.
Let’s address these, one by one.
Tongkat Ali Can Increase Luteinizing Hormone And Leydig Cells
Research studies (see below) have demonstrated that Tongkat Ali can stimulate the production of a hormone called luteinizing hormone, in your brain.
After being produced, this luteinizing hormone travels through your blood vessels to your testicles. When it arrives here, it starts binding to receptors on cells called Leydig cells.
When luteinizing hormone is bound to your Leydig cells, these cells are stimulated to produce testosterone.
Therefore, by increasing the amount of luteinizing hormone in your bloodstream, Tongkat Ali can make your production of testosterone jump.
But not only that:
Research (see below) has also shown that Tongkat Ali can increase the number of Leydig cells in your testicles. Now there are more of these cells that can produce testosterone.
Hence, your testicles should now be able to produce even more testosterone than before.
Tongkat Ali Can Make Less SHBG Bind To Testosterone
Research studies (see below) have reported that Tongkat Ali has the ability to make a protein called sex hormone-binding globulin (‘SHBG’), less capable of binding to testosterone.
SHBG binds to testosterone to transport it somewhere, or simply to store testosterone for later use.
Only about 3% of the testosterone in your bloodstream is free testosterone, and is therefore free to carry out tasks in the body.
The remaining 97% is bound to two proteins called SHGB and albumin. This testosterone is therefore not available for immediate use.
When Tongkat Ali makes SHGB less apt at binding to testosterone, it will normally mean that less testosterone is tied up. And the more free testosterone you have, the more impactful your testosterone is.
Tongkat Ali Can Decrease Estrogen Levels
Scientific studies (see below) have also demonstrated that Tongkat Ali has anti-estrogenic effects.
Meaning that it can reduce excess estrogen in your body.
You do need some estrogen, but excess estrogen will normally have a negative effect on both your libido and erections.
First of all, when you have more estrogen than you should, your estrogen / testosterone balance is off. This means that estrogen is likely to dominate several functions, which means that your testosterone will be less effective than normally.
Secondly, estrogen can also connect and occupy the receptors that are used by testosterone. Which means that less testosterone can connect to these receptors and be functional.
Here is an unfortunate fact:
It is relatively common for men with a modern lifestyle, to have excess estrogen levels.
This can be due to an unhealthy diet, including consumption of meat and dairy treated with estrogen.
It can also be due to consumption of alcohol, ingestion of chemicals that mimic estrogen in the body such as bisphenol A and phthalates, little or no exercise, overweight, etc.
It has also been speculated that wireless radiation and electronic devices play a part in this.
In fact, testosterone levels have decreased by about 50% in males over the last 40 years.
If you want to learn how to increase your testosterone naturally, you can read this guide.
Tongkat Ali Can Reduce Cortisol Production
Cortisol is the ‘stress’ hormone you produce in a ‘fight or flight’ situation. This in turn gives you extra strength and alertness to deal with the ‘stressful’ situation.
This can help you avoid danger. However, if you produce excess cortisol over long periods of time, it becomes a problem.
Elevated cortisol levels can disrupt many mechanisms in your body, and can by itself potentially cause or contribute to, erectile dysfunction.
Also, a persistent elevated cortisol level, will normally decrease your testosterone level.
The reason is that excess cortisol causes your testicles to produce less testosterone.
Tongkat Ali has been reported to (see below) have the ability to reduce this excess cortisol level.
Tongkat Ali Can Increase Dopamine Production
Research studies have also demonstrated that Tongkat Ali can increase your production of dopamine.
Dopamine is very important for two reasons: 1) for your sex drive, and 2) for your erections.
Firstly, in order to have a sex drive, you need dopamine. Dopamine is what motivates you to seek out sex. If you don’t produce dopamine, you will have little or no interest in sex.
Secondly, getting an erection is a complicated process of many steps. One of the first steps, is for dopamine to be produced in your brain, travel down your spinal cord, and instruct your penis to produce nitric oxide.
If you have inadequate dopamine production, this signal may be weak. Which may also cuase your erections to be weak.
As Tongkat Ali improves your dopamine production, your sex drive should go up, and you should also get erections more easily.
Scientific Studies On Tongkat Ali’s Impact On Libido And ED
In this section, you will find all the relevant scientific studies that have been carried out on Tongkat Ali, and its impact on sexual functions.
Or at least, you find all the relevant scientific evidence that I am aware of.
With this information at hand, you can better draw your own conclusions.
You will find a summary of the key findings from these scientific studies. And I have also included a link to the studies, should you want to read the actual studies yourself.
I have presented all relevant studies I am aware of, whether they indicate that the effect from Tongkat Ali was positive or negative.
Tongkat Ali Study 1: June 2019
The purpose of this study was to investigate the effect of Tongkat Ali on general well‐being, the brain cortical and hippocampal content of dopamine, serotonin, and noradrenaline.
48 male rats were divided into 6 groups of 8 rats each. The control group received 3 mL/kg of water, whilst the other 5 groups received 50, 100, 200, 400, and 800 mg/kg of Tonkat Ali extract, for 10 days.
On day 11, male and female rats were mated and sexual behavior parameters along with total body weights, were evaluated.
The outcome?
- The rats experienced a dose-related enhancement in sexual behavior from Tongkat Ali
- Relative weights of prostate and seminal vesicles were increased significantly at Tongkat Ali doses of 400 and 800 mg/kg
- Testosterone serum level increased by 67.1%, 127.8%, and 288.9%, compared to the of control group, at 200, 400, and 800 mg/kg of Tongkat Ali
- Free testosterone was significantly increased with all Tongkat Ali doses
- There were significant decreases in both follicle stimulating hormone and luteinizing hormone levels, particularly at higher doses of Tongkat Ali. This was a rationally and compensatory decline explained by the negative feedback inhibition mechanism controlling the internal endocrine environment
- There was a significant elevation of dopamine level at 200, 400, and 800 mg/kg of Tongkat Ali
Tongkat Ali Study 2: May 2017
Effects of Root Extracts of Eurycoma Longifolia Jack on Corpus Cavernosum of Rat.
The purpose of this study was to assess the mechanisms of action of Eurycoma Longifolia in rat corpus cavernosum.
63 rats were treated with different forms of Tongat Ali extract.
After the treatment, the rats were sacrificed and their penises dissected.
The outcome?
Several of the fractions were able to significantly cause corpus cavernosum relaxation. This relaxation is what enables the penis to be filled with blood.
Tongkat Ali Study 3: January 2017
The aim of this review was to analyze and summarize the literature on human clinical trials of Tongkat Ali, in improving male sexual health.
The outcome?
11 studies met the inclusion criteria. 7 of the studies demonstrated positive effects on male sexual health, while 4 studies failed to do this.
The findings revealed a promising efficacy of Tongkat Ali to treat erectile dysfunction in sexually sluggish males. Studies showed an ability to improve penile erection, erectile hardness and sexual performance.
This review also found that Tongkat ali had a positive effect on male infertility by significantly improving semen volume, concentration of sperm, and proportion of sperm having normal morphology and motility.
The study concluded that Tongak Ali possessed these enhancing effects due to its ability to increase testosterone production.
Tongkat Ali Study 4: September 2014
The goal of this study was to review existing studies about Tongkat Ali to determine whether it can safely increase testosterone.
The outcome?
- Tongkat Ali is a natural alternative to testosterone replacement therapy, and has been shown to restore serum testosterone levels, thus significantly improving sexual health
- This includes significant positive effects on bone health and physical condition of patients
- Tongkat Ali has a significant antihyperglycaemic effect
- It is cytotoxicity against prostate cancer cells
- No significant side effects of the treatment were obvious
- Therefore, Tongkat Ali might be a safe alternative to testosterone replacement therapy
Tongkat Ali Study 5: June 2014
The objective of this study was to assess whether Tongat Ali elevated serum testosterone, and increased muscle strength in humans.
13 healthy male recreational athletes consumed either 400 mg of Tongkat Ali, or a placebo, for 6 weeks. After the 6 weeks, there was a 3 week washout period, and then the groups switched for another 6 weeks.
The result?
Neither testosterone to epitestosterone ratio, liver nor renal functions were significantly different, following 6 weeks of supplementation.
Tongkat Ali Study 6: May 2014
The goal of this study was to investigate the in vivo effects of Tongkat Ali on body and organ weight, as well as on functional sperm parameters.
42 male rats were fed either 200 or 800 mg/kg Tongkat Ali extract, for 14 days.
Afterwards, the rats were sacrificed and analyzed.
The outcome?
- Testosterone increased up to 30.2%
- No changes in organ weights were found for the prostate, testes and epididymides
- Sperm concentration, total and progressive motility and vitality increased significantly
- Mitochondrial membrane potential improved up to 25.1%
Tongkat Ali Study 7: April 2014
This study aimed at investigating Tongkat Ali as a supplement intended to enhance physical performance, stamina, and recovery for elderly people.
13 physically active male and 12 physically active female seniors (57-72 years), were supplemented with 400-mg Tongkat Ali extract, daily for 5 weeks.
The outcome?
There was a significant increase in total and free testosterone concentrations, and muscular force, in men and women.
The increase in free testosterone in women was thought to be due to a significant decline in sex hormone-binding globulin concentrations.
Tongkat Ali Study 8: May 2013
The purpose of this study was to review the effect on stress hormones and psychological mood state in moderately stressed persons, from Tongkat Ali administration.
32 men and 31 women were given 200 mg/day of Tongkat Ali, or a placebo, for 4 weeks.
The outcome?
The study reported that after these four weeks, cortisol levels had dropped by 16%, and testosterone levels had increased by 37%.
It was indicated that this increase may be because less testosterone was bound to sex hormone binding globulin (SHBG), and therefore more testosterone was ‘free’.
In addition, the Tongkat Ali group also saw improvements in tension (11%), anger (12%) and confusion (15%) scores.
Tongkat Ali Study 9: February 2013
The aim of this study was to investigate the effects of Tongkat Ali and its chemical constituents, on male fertility and the mechanisms of action involved.
Groups of male rats were given different fractions of Tongkat Ali, or placebo, for 104 days.
The outcome?
Rats fed with Tongkat Ali experienced:
- A significant increase in sperm concentration and spermatozoa production rate
- An increase in testosterone level
- Higher luteinizing hormone and follicle stimulating hormone
- An increased number of Leydig cells
- Significantly lower estrogen level
- The fertility index and pup litter size of the females mating with males treated with Eurycoma Longifolia extract, were increased
The researchers concluded that the quassinoid eurycomanone was probably largely responsible for the effects.
Tongkat Ali Study 10: November 2012
The aim of this study was to investigate the clinical evidence of Tongkat Ali for the Improvement of quality of life and sexual well-being, in men.
109 men aged 30-55 years, participated in the study. They were given 300 mg/day of Tongkat Ali, or a placebo, for 12 weeks.
The outcome?
The Tongkat Ali group experienced the following after 12 weeks:
- Physical functioning: Increase of 10.0%
- Erectile function: Improvement of 8.7%
- Libido: Increase of 14.4%
- Sexual activity: Increase of 17.1%
- Testosterone: No change
In addition, the Tongkat Ali group saw an increase in sperm motility and increase in semen volume.
Tongkat Ali Study 11: August 2012
The objective of this study was to explore the bone structural changes following Tongkat Ali treatment, in normal and androgen-deficient rats with osteoporosis.
36 male rats were divided into various groups, and treated with Tongkat Ali, Placebo or testosterone.
Testosterone serum was measured both before and after the completion of the treatment.
The outcome?
Testosterone replacement was able to raise the testosterone level and restore the bone volume of orchidectomised rats.
Tongkat Ali supplementation failed to emulate both these actions of testosterone.
Tongkat Ali Study 12: May 2012
The goal of this study was to assess the aphrodisiac and testosterone enhancing effects of Tongkat Ali.
320 men with late-onset hypogonadism were given 200 mg/day of Tongkat Ali, or a placebo, for one month.
Late-onset hypogonadism is a condition in which the body does not produce adequate testosterone.
The outcome?
Before the treatment, 10.5% of the patients reported normal values according to ‘Ageing Males’ symptoms. After the treatment, 71.7% reported normal values.
And before the treatment, 35.5% had normal testosterone levels. After the completed treatment, 90.8% of the patients showed normal testosterone levels.
The study reported that the average testosterone levels had increased by 46% in the participants.
Tongkat Ali Study 13: April 2012
9-hydroxycanthin-6-one induces penile erection and delays ejaculation.
The aim of this study was to examine the effect of 9-hydroxycanthin-6-one, a β-carboline alkaloid isolated from Tongkat Ali, on penile erection and ejaculation.
The effects were studied on rat corpus cavernosum and seminal vesicle in vitro.
The outcome?
9-hydroxycanthin-6-one demonstrated an ability to induce penile erection.
The study concluded that 9-HC-6-one might be the active component that contributed to the aphrodisiac effect of Tongkat Ali, by antagonizing the smooth muscle tone of the corpus cavernosum, as well as seminal vesicle, through free calcium mobilization.
Tongkat Ali Study 14: January 2011
The goal of this study was to analyze whether 13α,21-Dihydroeurycomanone and Eurycomanone, two known quassinoids of Tongkat Ali, had anti-estrogenic effects. The study was done on rats.
The outcome?
The study concluded that both 13α,21-Dihydroeurycomanone and Eurycomanone had anti-estrogenic properties, and that Eurycomanone was the most potent.
Tongkat Ali Study 15: January 2010
The effect of Eurycoma Longifolia jack on spermatogenesis in estrogen-treated rats.
The aim of this study was to assess the inhibitory effects of estrogen on testosterone production and spermatogenesis.
24 rats were divided into 4 groups and given the following treatment for 14 days:
- Group A: Control group given placebo
- Group B: 8 mg/kg body weight of Tonkat Ali
- Group C: 500 microg/kg body weight of estradiol
- Group D: 8 mg/kg body weight of Tonkat Ali + 500 microg/kg body weight of estradiol
The outcome?
Rats treated with estradiol experienced spermatogenesis and sperm count decrease.
The group treated with the combined treatment experienced significantly less spermatogenesis and sperm count decrease, than the group treated with estradiol only.
Rats that were treated with Tongkat Ali alone exhibited significantly higher sperm counts and sperm motility, compared to the control group
The study concluded that Tongkat Ali acts as a potential agent for reversing the effects of estrogen.
Tongkat Ali Study 16: November 2009
The aim of this study was to evaluate the influence of Eurycoma Longifolia Jack on sexual behavior, (including both motivation and copulatory performance) of sexually sluggish and impotent male rats.
24 sexually sluggish or impotent male rats were divided into three groups:
- Group 1: Given one Tongkat Ali dose of either 250, 500 or 1000 mg/kg (acute)
- Group 2: Given 500 mg/kg Tongkat Ali daily for 6 days (subacute)
- Group 3: Given 500 mg/kg Tongkat Ali daily for 12 days (subchronic)
The outcome?
The study reported that both acute (dosed at 500 and 1000 mg/kg) and subacute treatments significantly reduced ejaculation latencies (time from the first intromission till ejaculation).
Both the acute (dosed at 500 and 1000 mg/kg) and subacute treatments increased the percentage of mounting and ejaculating animals.
The subacute administration also reduced post-ejaculatory interval.
Both subacute and subchronic treatments increased the percentage of mounting and ejaculating rats.
Testosterone levels were also increased in the subacute group (it was only measured in this group).
The study concluded that Eurycoma Longifolia root improved sexual performance, and that the effect could be mainly ascribed to increased testosterone levels.
Tongkat Ali Study 17: December 2004
The objective of this study was to evaluate sexual arousal in sexually sluggish old male rats, after administration of Tongkat Ali.
The rats received 200, 400, or 800 mg/kg of Tongkat Ali twice daily, or a placebo, for 10 days.
The aphrodisiac effect was measured by yawning and stretching. The reason is that yawning, either alone or associated with stretching, is considered behavior that promotes sexual arousal.
The outcome?
The study found that 800 mg/kg Tongkat Ali increased yawning by 50%, and stretching by 16.7%, in sexually sluggish old male rats.
For sexually active rats, the increases were even larger.
Tongkat Ali Study 18: September 2003
Eurycoma Longifolia Jack enhances sexual motivation in middle-aged male mice.
The purpose of this study was to investigate the effect of Tongkat Ali on sexual motivation in adult, middle-aged male mice, and in retired breeders.
This study used what is called the modified open field, and the modified runway choice methods.
Each mouse received 500 mg/kg Tongkat Ali in various fractions, 30 mg/kg of yohimbine, or a placebo for 10 days.
The outcome?
50 percent of the adult middle-aged male mice treated with Tongkat Ali and yohimbine, scored the right choice after 8 and 5 days post-treatment, respectively.
The researchers concluded that Tongkat Ali enhances sexual motivation in adult, middle-aged male mice and in retired breeders.
Tongkat Ali Study 19: February 2003
Effects of Eurycoma Longifolia Jack on sexual qualities in middle aged male rats.
The aim of this study was to study the effects of Tongkat Ali on the sexual qualities of middle aged, male rats.
Groups of rats were given 500 mg/kg of Tongkat Ali, or a placebo, for 12 weeks
The outcome?
Middle aged male rats given Tongkat Ali decreased their hesitation time to approach a female by 5-18%, compared to controls.
The study concluded that Tongkat Ali enhanced the sexual qualities of the middle aged male rats.
Tongkat Ali Study 20: December 2002
Effect of Eurycoma Longifolia Jack on orientation activities in middle-aged male rats.
The purpose of this study was to study the effect of Tongkat Ali on orientation activities towards receptive females, the environment, themselves and mobility, in rats.
Tongkat Ali, or a placebo, was given to the rats twice a day for 10 days.
The outcome?
Rats treated with 800 mg/kg of Tongkat Ali increased orientation activities towards the receptive females (anogenital sniffing, licking and mounting), compared to the controls.
They also increased genital grooming towards themselves, and restricted movements to a particular area of the cage, compared to the controls.
And they also decreased interest in the external environment (climbing, raring, exploration), as compared with the controls.
The researchers concluded that Tongkat Ali modified the orientation activities of the middle-aged male rats.
Tongkat Ali Study 21: September 2002
Effect of Eurycoma Longifolia Jack on libido in middle-aged male rats.
The purpose of this study was to examine the effect of increasing doses of various fractions of Tongkat Ali extracts, on libido in middle-aged male rats.
The outcome?
A high dose (800 mg/kg) of all Eurycoma Longifolia Jack extract significantly increased mount frequency over that of untreated controls, but had no effect on the frequency of intromission or ejaculation.
The study concluded that Eurycoma Longifolia Jack extracts can increase libido in middle-aged male rats.
Tongkat Ali Study 22: October 2001
The aim of this study was to investigate the effects of Tongkat Ali on the laevator ani muscle in rats.
The levator ani muscle forms part of the pelvic floor, and is key for getting and maintaining erections.
Groups of rats were given 200, 400 or 800 mg/kg of Tongkat Ali, or a placebo, for 12 weeks.
In addition, the study included a positive control group of testosterone-stimulated castrated male rats.
The outcome?
800 mg/kg of body weight of Tongkat Ali caused a significant increase in size of this muscle in the rats, compared to both the untreated group and the testosterone treated group.
The study concluded that the pro-androgenic effect of Tongkat Ali supported the traditional use of this plant as an aphrodisiac.
Tongkat Ali Study 23: August 2001
Evaluation of the potency activity of aphrodisiac in Eurycoma Longifolia Jack.
The purpose of this study was to investigate the aphrodisiac effects of Tongat Ali on male rats.
78 castrated male rats were given 200, 400 or 800 mg/kg Tongkat Ali, or a placebo, twice daily, for 10 days.
The outcome?
Tongkat Ali produced a dose dependent, recurrent and significant increase in the episodes of penile reflexes in the rats
The research concluded that the results provide further evidence that Eurycoma Longifolia Jack increases the aphrodisiac potency activity in treated animals.
Tongkat Ali Study 24: August 2001
The goal of this study was to assess the effect of Tongkat Ali on sexually sluggish rats.
100 sexually sluggish and old rats were given 500 mg/kg of Tongkat Ali extract (4 different extracts were tested), or a placebo, daily for 12 weeks.
The aphrodisiac effect of Tongkat Ali was evaluated using an electrical cage. The rats would have to cross an electric grid giving off an unpleasant shock, in order to get to the female rats.
The outcome?
Rats given Tongkat Ali demonstrated a reduced hesitation time to enter the electrical cage, compared to the control group.
The rats treated with Tongkat Ali also became significantly better at making ‘right choices’, when selecting cages to approach females.
The researchers concluded this study lends further support to the use of the plant as a traditional medicine for its aphrodisiac property.
Tongkat Ali Study 25: January 2000
The purpose of this study was to analyse the effects of Tongkat Ali on the initiation of sexual performance, and the weights of sexual accessories, in male rats.
The rats were given 200, 400 or 800 mg/kg body weight of Tongkat Ali, or a placebo, twice a day, for 10 days.
One group of rats were also injected with 15 mg/kg of testosterone daily, for 32 days.
The outcome?
Tongkat Ali produced a dose-dependent increase in sexual performance in the Tongkat Ali treated rats.
However the Tongkat Ali treated rats showed lower sexual performance in mounting, intromission and ejaculation than the testosterone group.
The rats given Tongkat Ali also promoted the growth of both ventral prostate and seminal vesicles (part of sexual organs) as compared with the control group, but less so than the group treated with testosterone.
The researchers concluded that the study gives further evidence of the folkuse of Tongkat Ali as an aphrodisiac.
Tongkat Ali Study 26: December 1998
Eurycoma Longifolia increases sexual motivation in sexually naive male rats.
The aim of this study was to provide evidence of the aphrodisiac property of Eurycoma Longifolia Jack.
260 sexually naive male rats received 200, 400, or 800 mg/kg of Tongkat Ali extract daily, or a placebo, for 12 weeks.
In order for male rats to reach a receptive female, they had to cross an electric grid that produced an adverse shock.
The outcome?
The rats supplemented with Tongkat Ali showed a significantly stronger willingness to cross this electric grid and endure pain, than the control group.
And those who received larger doses, had a stronger willingness to cross the barrier.
In addition, these rats also demonstrated a higher number of mountings, intromissions and ejaculations during the 12 weeks, than the control group.
Tongkat Ali Study 27: February 1998
Eurycoma Longifolia JACK and orientation activities in sexually experienced male rats.
The purpose of this study was to analyze the orientation activities of sexually experienced male rats towards receptive females.
Groups of rats were given 200, 400 or 800 mg/kg body weight of Tongkat Ali, twice a day, or a placebo, for 10 days.
The study found that rats given Tongkat Ali displayed significantly more frequent and vigorous mounting, licking and anogenital sniffing towards the receptive females.
These rats also further intensified self orientation, as indicated by the increased grooming of the genitals compared to the controls.
The Tongkat Ali treated rats also showed a lack of interest in the external environment, as indicated by a reduction in exploration, raring and climbing on the cage wall.
Tongkat Ali Study 28: October 1997
Eurycoma Longifolia Jack enhances libido in sexually experienced male rats.
The goal of this study was to assess the effects of Eurycoma Longifolia Jack on the libido of sexually experienced male rats.
In this study, experienced male rats were given 200, 400 and 800 mg/kg body weight of Tongkat Ali twice daily, or a placebo, for 10 days.
The outcome?
The research found that Tongkat Ali produced a dose-dependent increase in mounting frequency of the treated animals.
Other Tongkat Ali Health Benefits
Several of the research studies above demonstrated that Tongkat Ali can have a positive effect on male fertility. It can increase semen volume, concentration of sperm, and proportion of sperm having normal morphology and motility.
Tongkat Ali is also claimed to increase adenosine triphosphate (‘ATP’) production. ATP is the basic unit of energy in the body, responsible for keeping us alive and going. By increasing ATP, overall energy and vitality will typically also increase.
Because of this, and coupled with the ability of Tongkat Ali to increase testosterone levels, Tongkat Ali is a supplement often used by athletes and bodybuilders.
Tongkat Ali is also claimed to be an adaptogen. An adaptogen is a plant that has an effect on all or several systems within the body, and works to normalize the ones that are out of balance.
It won’t impact systems that are already in balance, but only target those that function sub-optimally.
An adaptogen does this without causing harm to any parts of the body, and it also stops the impact once the body is in balance.
In Vietnam, Tongkat Ali is known as the ‘tree of a 100 cures’, perhaps due to its adaptogen properties.
This root also contains protective antioxidants, which eliminate free radicals.
It is used as a remedy for malaria, high blood pressure, fevers, and fatigue. It is also claimed to be antidiabetic, antimicrobial, antipyretic, antifungal, anticancerous, antiviral anti-inflammatory.
Some people also use it to treat high blood pressure, diarrhea, cancer, anxiety, aches, constipation, leukemia, osteoporosis, stress, and glandular swelling.
It is also used to cure lumbago, indigestion, jaundice, cachexia, dropsy, and dysentery.
It has also been reported to help against syphilis.
Tongkat Ali is also used as a general health and well-being supplement for enhancement of the mind and body.
Many people also use it to reduce the effects of depression.
It is also used to maintain strong skeletal and bone health.
Let me tell you about my experience with Tongat Ali supplements.
My Experience With Tongkat Ali Supplements
- Form: At least 100:1 extract in powder form
- Dose: One tablespoon (not fully topped) (approximately 7 grams)
- When: 60-120 minutes before sex
- Effect on libido: Good
- Effect on erections: Very good
- Effect on sensation: Very good
- Taste: Absolutely awful
- Verdict: One of my favorite supplements
- Noticed side-effects: None
I have by now taken Tongkat Ali several times, and it has become one of my favorite supplements.
The reason?
The effects are simply amazing.
But before I get to the effects, let me explain how and when I take it.
It takes some time from when you swallow something, until it starts having an effect on your body.
In my experience, I would say it takes at least 40 minutes or so for Tongkat Ali to have an effect. Therefore, I normally take it 60-120 minutes before sex.
I also don’t want to take it 6 hours before sex, because the body processes anything you put into it. Therefore, the effect will start to taper off at some point.
When I get Tongkat Ali, I like to buy it in powder form. This way, I am more certain that it is pure and also fresher.
If I can, I like to buy it directly from a manufacturer, or from a seller that gets products directly from the manufacturer. This way I can get a product that is as fresh as possible.
In the past, I mixed a tablespoon of the powder in cold water, and drank the mix.
But it tastes so awful (absolutely disgusting) that it almost made me vomit.
Therefore, I now put the powder in capsules to avoid the terrible taste. If you want to buy capsules and a capsule set, you find them here.
So what effects do I get from taking Tongat Ali?
I get three:
Firstly, I normally get an increase in my libido. After about an hour of taking it, I often feel that my sexual energy is somewhat increased. I have more sexual thoughts and want sex more.
However this is normally the least pronounced effect of the three.
Secondly, I get erections more easily. It normally takes very little stimulation in order to ‘get it up’. Normally, as soon as there is kissing or foreplay, I get an erection.
My erections are normally also fuller.
And I normally have no problems with erections fading during sex. The erections are persistent and last pretty much for as long as I want.
Lastly, Tongkat Ali also takes sex to another level. It amplifies the pleasurable sensations from sex, and makes them even more intense. The orgasms are also stronger.
The effects I have experienced from Tongkat Ali have been absolutely remarkable, and it is a supplement I really enjoy.
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Although Tongkat Ali is great on its own, the effects are even more intense when I combine it with other supplements.
And when I take Tongkat Ali today, I normally always combine it with three other supplements.
Why?
Because when I do, the effects are stronger and more reliable.
In fact, the erections I get when taking this combination, are on par with erections I got when I took pharmaceutical drugs in the past.
But with none of the side-effects.
And with two additions benefits: A stronger libido and more intense sex.
This is the combination I normally take when taking Tongkat Ali:
- L-arginine (7 grams)
- Pine bark (7 grams)
- ZMA (0.5 grams)
- Horny Goat Weed (7 grams)
By the way, even though Tongkat Ali can be of amazing help to function sexually, taking a pill or a supplement is not the ideal long-term solution.
The ideal long-term solution should be to overcome erectile dysfunction naturally and permanently. You can learn more in this guide.
Safety Of Tongkat Ali Supplements
Is it safe to take Tongkat Ali in the doses that I have taken? Which is about 7 grams.
I wish I could give you a clear answer, but I can’t. The answer is that I don’t know.
I am not a doctor and I don’t know for sure whether this is indeed safe.
However, in some of the research studies above, the participants noticed no material side effect from taking relatively large doses of the supplements.
Personally, I have never experienced any side effects from taking Tongkat Ali in these doses.
I have taken these supplements on multiple occasions over several years, and not a single time have I experienced negative side effects.
However, that does not mean that it is 100% safe. There is also a chance that your body may react differently than my body, should you want to try the same dosage.
Hence, should you want to try Tongkat Ali in the doses I have taken, you do this 100% at your own risk.
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