Mucuna Pruriens and Testosterone: The Androgenic Benefits of L-Dopa

Mucuna Pruriens (velvet bean) is an indian bean-like climbing herb that can reach 15 meters in length.

Mucuna is widely used in Ayurveda (Indian herbal medicine) and its usage as a Parkinson’s relief and sexual tonic dates back thousands of years. It has also quite a reputation for its effects on increasing testicle size. Recently this herb has gotten the interest of several researchers. It’s due to the fact that Mucuna Pruriens contains L-DOPA (levodopa) which is the precursor for the hormone/neurotransmitter dopamine.

There are several mucuna pruriens benefits that have been scientifically proven through supplementation (explained more in detail below), including;

  • Significant increase in sperm volume and quality on infertile test-subjects.
  • Reduced levels of cortisol and oxidative damage
  • Activation of androgen receptors.
  • Boost in dopamine production.
  • Increased testosterone levels.
  • Decreased prolactin levels.

What are the Mucuna Pruriens Benefits?

mucuna pruriens testosterone boostersM. pruriens truly sounds like a magic-pill, heck, lay out the benefits list and it seems like this magic-bean does everything.

It would be easy to call shenanigans on the claims since natural supplements are often just smoke and mirrors, BUT, the thing is that there’s actually a mounting pile of scientific evidence supporting the use of mucuna. Due to the bean being the richest known source of L-DOPA (levodopa) – and L-DOPA being a precursor to the brain neurotransmitter/hormone dopamine – it has been shown on many trials that the administration of levodopa will quickly convert into active dopamine.

This dopamine boost then accounts to many of the mucuna pruriens benefits, as it’s known that increased dopamine can upregulate androgen receptors, suppress prolactin, increase the rate of testosterone synthesis by stimulating GnRH release in the hypothalamus, and even boost growth hormone.

The rest of the benefits, like improved sperm quality and reduced cortisol levels, are likely caused by the high antioxidant activity of the bean.

Most of mucuna’s benefits are in a way or another related to either its high levodopa content or antioxidant profile.

When it comes to the mucuna pruriens testosterone benefits, the first evidence came from animal studies. In rats, pretty high dose of L-DOPA (1000mg/kg) was found to significantly increase the release of luteinizing hormone (LH) from the pituiary gland and lead to higher testosterone levels over 7-14 days. On Japanese Quails (yes, birds) it was shown that when nearly half of their feed is replaced with mucuna pruriens seed powder, their testicular activity shoots up, LH levels surge, and testosterone levels are significantly increased. On this third study, high doses of estrogen were administered to male rodents in order to make them infertile and suppress testosterone levels, the researchers then used M.Pruriens to see if it would combat these effects, and the short version is that it did.

In humans, the first study to examine mucuna’s effect on the reproductive system noted that on men with stress-related infertility, 5g/day of mucuna seed powder for 90 days was able to increase the sperm volume by 688% on infertile men, and 32% on non-infertile men (less room for improvement i guess?) serum cortisol levels were also reduced by a staggering -110% on the infertile group and -38% among healthy subjects.

Second study – again with infertile subjects – showed that 5g/day of M. Pruriens seed powder for 90 days, increased testosterone levels by 38% on infertile subjects and 27% on healthy subjects, LH was raised by 41% on the guys shooting blanks and by 23% on healthy subjects. As to be expected, sperm quality rose in both groups (more so in the infertile group), semen dopamine levels were elevated, and prolactin (a hormone that suppresses LH release) was down by -32% and -19%.

On the third human study (once again infertile guys) mucuna powder was administered to 180 men, resulting in 38% increase in average testosterone levels. The fourth L-DOPA testosterone study showed that subjects with Parkinson’s disease can benefit from taking up to 600mg’s of levodopa as it maintains and increases their free-testosterone level when compared to placebo.

More interestingly, the studies done with isolated cells inside test-tubes have been shown that L-DOPA acts as a coactivator protein to the androgen receptors (AR) and enhances their activity in uptaking testosterone and DHT (study, study). So not only can mucuna potentially increase the levels of androgens, it may also upregulate the receptor sites to better utilize them too. As you can see, there seems to be a lot of mucuna pruriens testosterone benefits.

Hormonal benefits aside, mucuna pruriens can also improve your cognitive functions.

Since L-DOPA can cross the blood-brain barrier, and converts into the neurotransmitter dopamine, it’s only natural to assume that it could yield nootropic (brain boosting) effects. And yes, a double-blind placebo controlled study of 40 participants showed that L-DOPA administration significantly improves the learning ability, speed, and memorization of “pseudowords” during artificial vocabulary test.

We at Anabolic Men recommend a mucuna pruriens dosage of 250-500mg’s with high-quality mucuna pruriens extract (affiliate link) for high yields of levodopa, which seems to be the master ingredient behind most of the seeds benefits. To furthermore enhance L-DOPA conversion to active dopamine, you can stack mucuna with vitamin B6.

Conclusion on Mucuna Pruriens Testosterone Benefits

There’s a reason why the pharmaceutical industry uses levodopa extracted from mucuna pruriens in so many of its prescription drugs. There is a plethora of positive mucuna pruriens side effects. The stuff simply works.

Even though there’s a mounting pile of scientific evidence supporting the benefits, people still seem to prefer buying ineffective supplements like tribulus or antler velvet (which have time after time proven to be useless) over mucuna.

NOTE: For best results, get cold water extracted mucuna that is high in the actual L-dopa (see link above).

Mucuna Pruriens and Testosterone: The Androgenic Benefits of L-Dopa was last modified: January 25th, 2018 by Ali Kuoppala

Ali Kuoppala

Ali Kuoppala is the founder of Anabolic Men, and an Independent Researcher that has been credited with organizing the findings that have helped thousands of men reach hormonal balance.
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  1. TheKid on 01/06/2014 at 05:55

    Any other recommended sellers? The one listed no longer sells this item. I’m in Amazon right now ready click lol

  2. TheKid on 14/07/2014 at 05:10

    Out of all the herbs I take, this one tastes the worst. I dread Mucuna Pruriens day and wait until leg day to take it. Whenever I do take it though, around 1 to 2 hours later I get this sensation of “feeling ok” ceases my dwelling. I can only assume thats the dopamine a work.

    • Ali Kuoppala on 01/08/2014 at 20:52

      I’ve seen that my writing is much more easier on the days that I’m taking mucuna, not sure why this happens, but now I’m strategically planning my most important articles to be written on mucuna days.

    • Joe on 15/03/2017 at 14:05

      Have you tried tongkat ali AKA longjack? That stuff tastes horrid. But, also works…

  3. Ali Kuoppala on 01/08/2014 at 20:54

    I vary my personal cycles a lot. But in general its one or two herbs a day, and never the same herb 2 times in a same week. Here’s an article about cycling if you haven’t seen it yet:

  4. Ali Kuoppala on 30/12/2014 at 22:00

    Interesting find. Examine is a very trusted source indeed, and I will not argue against their knowledge.

    I often take mucuna right before workouts, and I haven’t seen any negative effects. Only positives.

    But if the herb really has the potential to block protein absorption, then I think I’ll start taking it to a empty stomach in the mornings. I’m not sure but my guess is that mucuna will only block protein absorption for a short while right after ingestion, but not thorough the day.

  5. Ali Kuoppala on 30/12/2014 at 22:03

    I’ll do that, once I have the time 😉

    Greg’s work is quite phenomenal. Not the same bullshit that you can find in regular bodybuilding sites, books, and forums.

    I’ve read many of his programs and taken some pointers from them into my own workouts. Highly recommend his work.

    Also check out Greg’s site at:

  6. Jason Panelli on 31/12/2014 at 08:34

    Love your site.Probably one of the most informative sites I’ve
    come across with regards to supplements.Just wanted to clarify,that when
    you say you take 10-20 grams of Mucuna a week,do you take it all in one
    shot on that one day,or do you stagger the dosages throughout the
    day?Also,do you cycle between 10-20 grams,or does it just depend on how
    you are feeling?Thanks again.

  7. mikeylikesit on 09/01/2015 at 01:06

    Does this kind of raise in T-levels cause your body to aromatase? Anybody know the answer to this? If so are there herbal aromatase inhibitors?

  8. […] Herbs – like Ashwagandha, Forskolin, Mucuna Pruriens, and Tongkat Ali have shown to be effective at increasing testosterone levels and sperm parameters […]

  9. […] my previous article about mucuna pruriens, I linked few studies which showed how L-DOPA from mucuna pruriens was able to increase […]

  10. […] is one of my all time favorite testosterone boosters, mainly because it has human studies that prove its […]

  11. Adam Russell Siddals on 28/02/2017 at 20:49

    Hi. Someone pointed out to me that it is l-dopa decarboxylase (the thing that converts l-dopa to dopamine that upregulates ar activity not L-dopa itself. What’s your thoughts on this

  12. Salman Anwer on 21/05/2017 at 15:47

    I can send send you Mucuna preiunes pure form any where in world subscribe my Facebook page
    Named “bolan fans” message me there !

  13. Cameron S Felton on 06/06/2017 at 00:27

    I’m doing the minoxidil experiment and am trying to.grow a beard. With the increase in DHT in conjunction with the minoxidil, I should see results much quicker with this instead of just the municipal. Cheers to.the beardsmen out there!

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