A Natural Testosterone Booster for Men and Women

Longjack: The Proven T-Booster

This natural testosterone booster works through different mechanisms to benefit both sexes. Here's the science and where to get it.

Several studies show that Longjack (Buy at Amazon) (an extract of the Eurycoma longifolia bush), elevates testosterone levels in men. However, a newer study found that the herb raises T levels in women as well.

What the Researchers Did

First, they recruited 25 cyclists, 13 of them male and 12 of them female. All belonged to the same over-50 cycling club. Each cyclist received 200 mg. of Longjack daily for five weeks. The researchers took before, during, and after measurements of cortisol, IGF-1, DHEA, testosterone, and grip strength.

What They Found

While levels of cortisol, IGF-1, and DHEA remained largely unchanged, free and total testosterone levels went up significantly in both men and women, as did grip strength.

Men's Graph

Women's Graph

Clearly, the Longjack raised testosterone levels in both sexes and consequently increased their strength, too. The testosterone increases in men were apparently caused by elevated luteinizing hormone (LH) and follicle-stimulating hormone (FSH), along with concurrently lowered estradiol levels.

The increase in women's testosterone levels was caused by a significant decline in sex-hormone binding globulin (SHBG). That means the herb prevented the testosterone that women make naturally from being chemically bound up and made inaccessible to the body by SHBG.

What These Findings Mean To You

Older men and women can benefit from taking Longjack to raise testosterone levels. While it's true that previous studies have concentrated on its testosterone-elevating effects in younger men, it's not known whether these findings would hold true for younger women, too.

Younger women generally have lower SHBG levels than older women and might not feel a big difference from Longjack. Younger women also have to be wary about the potentially masculinizing effects of elevated levels of testosterone. (That said, some women can suffer from low T, just like men. Info here.)

However, if you're a man who feels he might benefit from higher levels of testosterone (or an older woman who feels the same), take a daily dosage of Longjack. Biotest's Omega-Man High Absorption Longjack (Buy at Amazon) supplement, contains LJ100, the purest and most potent form.

Buy Omega-Man at Amazon


  1. Henkel RR et al. Tongkat Ali (Longjack) as a potential herbal supplement for physically active male and female seniors–a pilot study. Phytother Res. 2014 Apr;28(4):544-50. PubMed.

Was it 400 mg or 200 mg?

  1. Thank you.
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I have some concern that a study on mice shows Tongkat Ali causes DNA damage at the first point of tissue contact – in this case, the stomach and duodenum.

The effect happened at the highest dosage. Assuming my math is correct, I estimated that to be at the human equivalent dosage of 500 mg, not much more than the 400 mg in the study you mentioned.

What’s your take on this? At the very least, it seems like if someone wants to take this, it should be with a significant amount of food to dilute the effect (if that’s possible).

Looks like Alpha Male might need a name change. Don’t know too many females that would take it while it’s called that. Lol

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The dosage that elicited those effects was the highest dosage tested: 2,000 mg. per kilogram of bodyweight. In a 200 pound man, that would be roughly 181,818 mg. Or did I read it wrong or screw up on the math? Entirely possible.

I think your mouse might be extremely obese. I originally used a lower human weight, but here’s what AI said about a 200 lb human (because I’m no math wiz, either):

  • Rats showed DNA damage at 2000 mg/kg
  • Rat dose = 2000 mg/0.25 kg rat = 8000 mg
  • Using the human:rat body surface area ratio of 12.3

Human equivalent dose
= (Rat dose in mg) x (Human weight in kg) / (Rat weight in kg) x (1/12.3)
= (8000 mg) x (90.7 kg) / (0.25 kg) x (1/12.3)
= 637 mg for a 200 lb (90.7 kg) human

So, based on the rat study results, the equivalent dosage that caused DNA damage in the stomach and duodenum for a 200 pound human would be approximately 637 mg.

That’s significantly better if you take weight into the equation, especially since I think they said the problem ONLY shows up in the highest dose.

Also, considering that the epithelial cells that line the stomach have a relatively rapid turnover rate, it seems like adjusting the dosage for weight, combined with cycling the dosage (to allow the stomach to recover), combined with taking it with food, should lessen the chance of DNA damage.

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Then again, body weight shouldn’t be that important when we’re talking about initial tissue contact. Instead, I’d surmise that dilution and cell turnover rate would be more important. But I’m not a scientist or doctor, so…

Are you sure about the numbers? 2000 mg for a rat and 637mg for a 200 lbs human? Something is off.

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Yeah, I can’t say I disagree. It’s actually converted to 8000 mg to for the kg calculation, but the human dosage still seems low. That surface area ratio must be wrong. That’s what I get for asking AI.

And one more thought: I’m not sure how much volume 2000 mg of Tongkat Ali would take up, but it seems like that would be one overly full mouse! That means most, if not all, of the stomach was covered with Tongkat Ali, and I expect digestion would have been slowed down – keeping the substance in the gut a lot longer.

EDIT: Brain fart. It’s not a 2000 mg mouse dose, it’s 2000 mg per kg. Mice only weigh about 0.02 kg, so they were actually given about 40 mg.

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Not that anyone probably cares anymore, but I had the AI recalculate after inputting an article on how it should be done, and the result was 14,694 mg.

That at least sounds like a realistic human equivalent dose. At this point, it’s case closed for me and I’m no longer as concerned about the study. Thanks to TC_Luoma and everyone for your help and patience.


Man, glad to hear that! I kept thinking to myself, “What am I missing here?”

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For future reference, I found an online calculator that does the work for you. Just scroll down to Simple Human Equivalent Dose Calculator and pick your animal.


I used Tribulus Terrestris about 16 years ago. It elevated my t-levels, but also jacked up my PSA. I switched to Yohimbe Bark and my t-levels were good without the high PSA.


What is the suggested cycling of this product? All the info I could find was off of the old product.

There’s no cycling recommended anywhere in the T-Nation literature for Omega-Man. Nothing on the bottle like there was for Alpha Male. I also note that there is no cycling recommended anywhere related to Carbolin 19. So it must have been the Tribulas that created the cycling recommendation for Alpha Male. I plan to take Omega-Man and Carbolin 19 together going forward with no cycling.

No need to cycle.

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I can attest that TA works for me. I take pure TA powder twice a year, the most recent being Jan 16 to to March 27. I got a hormone test done right before starting and immediately after stopping. I combined the TA with Pine Pollen powder. My testosterone level was 488 at the beginning of the cycle. It was 845 after stopping. My free testosterone was also higher. I took 100 mg of TA and 1 tsp of Pine Pollen powder Mon-Fri twice a day. I’m 66. BTW - pure TA powder is very bitter. I haven’t tried Omega Man yet, however, I see that it has 300 mg of TA so am wondering how much higher my Test level could have been.

Never heard of Pine Pollen Powder. Thank you for info. Where do you get yours? US sourced?

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