The ultimate testosterone-boosting stack for men (Part 2)

Last week I sent you Part 1 of my ultimate testosterone-boosting stack.

If you missed it, click this link here to get up to speed.

Today, I’m going to share with you three more potent, effective testosterone-boosting ingredients to complete your stack.

Let’s dive right in.

Vitamin D

I’d bet you didn’t expect to see this on the list. But vitamin D happens to be critical to maintaining healthy testosterone levels in men.

It is estimated that up to 85% of Americans have insufficient levels of vitamin D.

Virtually every tissue type in your body has receptors for vitamin D. In other words, they all require vitamin D to work properly. This includes hormone systems like the ones that regulate testosterone.

But vitamin D deficiency isn’t just linked with low testosterone levels. It can also lead to increased risk of numerous chronic disorders like Type II diabetes, cancer and infections. Cardiovascular, autoimmune and neurological diseases are also connected to not getting enough vitamin D.

The best way to get adequate amounts of vitamin D is by spending time in the sunlight. That’s because your skin naturally converts the sun’s rays into vitamin D in the body.

But in our hectic society, most of us don’t spend enough time in the sun on a daily basis — especially those who live in parts of the country with colder climates during parts of the year.

And for those in perpetually sunny climes like Florida where I live, they may try to stay indoors as much as possible to avoid the sometimes-oppressive heat.

You can boost your vitamin D levels through diet, but not nearly enough to accommodate insufficient sunlight exposure. Plant-based vitamin D is actually a form a vitamin D called D2 … and unfortunately, it isn’t metabolized by the body very well.

Supplemental vitamin D3 is the next-best thing to spending a day in the sun.

In one study, researchers found that 3,332 International Units (IU) of vitamin D elicited a significant increase in total testosterone levels. (Total testosterone levels means what is in your blood at the time of the test.)

The same was true when it came to bioactive testosterone (the bulk of the total, which is bound to sex hormone-binding globulin, or SHBG) and free testosterone (or, unbound) levels.

Meanwhile, there was no significant change in the placebo group.

Another study concluded something else about men with sufficient vitamin D levels. That is, they had considerably higher levels of testosterone and Free Androgen Index (FAI) when compared to men with lower vitamin D levels. (FAI can give some indication of the level of the body’s free testosterone.)

The best way to check if you have low vitamin D levels is to receive a blood test and then supplement with the recommended dose from your doctor.

Now for your next way to boost your testosterone naturally …

Mucuna Pruriens

Mucuna is widely used in Ayurveda (Indian herbal medicine). It can also provide relief to individuals with Parkinson’s disease.

This is due to the fact that Mucuna Pruriens contains L-DOPA, which is the precursor for the hormone/neurotransmitter dopamine. (Unlike dopamine, L-DOPA can transcend the blood-brain barrier.)

This dopamine boost can provide many advantages. This includes increasing the rate of testosterone synthesis by stimulating GnRH release (which stimulates follicles and releases hormones) in the hypothalamus. It can even boost growth hormone (which stimulates cell reproduction and regeneration).

A few highlighted studies:

In humans, the first study to examine Mucuna’s effect on the reproductive system showed some interesting results.

The study found that, for 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.

Serum cortisol levels (i.e., the "stress hormone") were also reduced by a staggering -110% on the infertile group and -38% among healthy subjects.

Another study with infertile participants showed that 5g/day of Mucuna Pruriens seed powder, taken for 90 days, increased testosterone levels by 38% on infertile subjects and 27% on healthy subjects.

Now here’s the third part of today’s testosterone-building stack …

Dehydroabietic Acid (DA)

The final ingredient in our stack isn’t a testosterone-booster, but rather an estrogen-modulator.

Testosterone can and does convert to estrogen (estradiol). So, increasing testosterone can result in increasing estrogen.

Aromatase is the enzyme responsible for converting testosterone into estrogen. DA is an aromatase inhibitor.

That means DA prevents the aromatase enzyme from taking action on your testosterone.

Before you start "stacking" these solution, however, here is …

A Word About ‘Cycling’

I have one more important point to make when it comes to supplements, or "stacks," like these.

The general recommendation is take them in eight-week time periods, followed by four weeks off. This is to give your hormones a break.

Of course, like I mentioned last week, the first step in fixing your testosterone levels is to have your doctor do a blood test. Then you can determine if some or all of our six solutions — ashwagandha root, eurycoma longifolia, stinging nettle leaf, vitamin D, mucuna pruriens and dehydroabietic acid — should be part of your healthy routine.

I hope you enjoyed this two-part series on naturally boosting your testosterone.

We would love to hear your own experiences and recommendations. Drop us a line in the comment section below.

Happy and Healthy Investing,

Brad Hoppmann

Your thoughts on “The ultimate testosterone-boosting stack for men (Part 2)”

  1. Thanks Brad. It might also be useful to mention that vigorous (particularly outdoor), physical activity (running, climbing, working, etc.), combined with indoor weight training can have many of the same benefits as dietary supplementation, but without as much risk of creating a hormonal unbalance. The body wants to move…

  2. Again, both articles very interesting, but where I could get a product which contains
    all the issues together?

  3. Another great read, Brad. Great that you mention supplement cycling. Many people are not aware of the fact that supplements (and other compounds) can diminish in effects when taken too regularly. Probably the best example of this is caffeine. It is also important to give your body a break every now and then.

    Also, while I was searching for increasing testosterone naturally, I came across a guide that might be interesting to read, Brad. (

    What is your thought about intermittent fasting for testosterone. Throughout the guide I just mentioned, the author cites a study in which a group of males increased their testosterone by 180% after a short Ramadan fast. Did you come across any research about it?

  4. I’m sorry for being so persistent, but as I have pointed out several times in the past that nothing can be reduced by more than 100%! If a thing is reduced by 100% it is gone! It can not be reduced any farther. So in saying that something is reduced by 110% or 130% or even 250% is just not correct. If you say that something is reduced by 110%, what you probably mean to say is it is reduced by 55%.

  5. I am 77 and been part of the GrassrootsHealth vitamin D research project since its inception. Most members of GrassrootsHealth get tested twice a year and at each test, fill out a lengthy health and lifestyle questionaire. These tests and questionaires from thousands of worldwide members enable GrassrootsHealth to compile useful data in determining causal relationships between blood level of vitamin D and various diseases and health issues. They’ve proven that adequate blood levels can prevent 2/3 of total cancers. The dose required varies with each individual. I need 10,000 iu D3/day to maintain my desired serum 25(OH)D of at least 70 ng/ml. I also “stoss” or take a megadose of 200,000 iu at first sign of a scratchy throat. For me that has fended off all colds and flu since I practiced stossing.

  6. Brad thanks for these articles. I enjoy them very much. I have one question on this article.

    How can serum cortisol be reduced to less than zero, “Serum cortisol levels (i.e., the “stress hormone”) were also reduced by a staggering -110% on the infertile group?” Are world banks involved? Ha! Ha!

  7. My Naturopath prescribed Vit D by Genestra, about 10 years ago. I’m 82 and still active
    exercising and biking 20km a day and can still get it up when required.
    I think a good Naturopath has kept me well for 30 years, no Drugs

  8. is there a supplement on the market that includes all the ingredients you described

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