Many of us have the same goals. We want to keep our weight down, build lean muscle, and feel our best. As we get older, though, some of our goals become harder to reach. For men, that can be because of declining testosterone. There a number of great testosterone boosters on the market, like the ones we’ve reviewed

Before taking a supplement, though, you should know how it works. We have researched a number of testosterone supplements, and found some that even work all-naturally. Looking at the whole category, we’ve found several ways that proven testosterone boosters achieve results, and we’ve outlined them here. If you still have a few questions, make sure to check our FAQs and links.

D-Asp: Most Effective Ingredient

By far the most effective ingredient in many T-boosters is D-Aspartic Acid. D-Asp is an amino acid that your body can synthesize from other components. The typical diet doesn’t contain enough of it to have any effect on testosterone levels.

In human and animal studies, subjects who take additional, supplement D-Asp have significantly higher levels of testosterone. Some studies have shown that even days after taking the last dose, adult men still had higher levels of testosterone than before. 

The way it works isn’t yet fully understood, and one study we found identified 11 different ways that D-Asp influenced the body to make more Testosterone, and keep it circulating in the system.

That last point is the biggest key: D-Aspartic Acid helps your body make its own testosterone. It is not a hormone injection, and it only increases your body’s production to the highest level it would naturally.

Traditional Herbs

Herbal medicine has been around for centuries, but modern science has only just recently been giving it its due. Many herbs that have been given in traditional cultures have been studied to give exactly the benefits that native peoples have known about for years.

Three key ingredients that we’ve found in the most effective Testosterone Boosters are Fenugreek, Panax Ginseng, and Ashwagandha Root.


This natural herb is native to the Near East and the Mediterranean. It has been used for centuries to help with male drive, energy, and focus. In recent studies, it has been shown to block the production of two enzymes that break down testosterone in our system.

By blocking those enzymes, you can see more benefits from other ingredients that may boost your testosterone. Without the fenugreek, you may not see the full effect of the other aspects of a given supplement.

Panax Ginseng

One thing to note right away, there are two kinds of ginseng: American and Red, also called Asian or Korean. The red ginseng’s scientific name is Panax Ginseng, and that’s how quality supplement manufacturers will refer to it. They do this because Panax Ginseng is chemically different, and has been proven to have significant health benefits. So be aware of which ginseng a label claims to have.

Panax Ginseng is so powerful in testosterone supplements because it actually impacts the pituitary gland directly, influencing it to produce more testosterone. This powerful key has been understood in traditional medicine, and is now being recognized by Western supplement makers.

Ashwagandha Root

Known for centuries in Ayurvedic medicine, this root has been given to men of a certain age with powerful results. Recent studies have also proven out its effectiveness for men to help with their drive, energy, and male performance.

What the studies have found is that Ashwagandha has a direct effect on the gonadotropin-releasing hormone in the testes. This hormone influences the Leydig cells to produce testosterone. That highly specific mechanism has been shown in animal and human studies.

Vitamins and Minerals

It may sound pretty basic, but there are a number of reasons why our body can go out of kilter, and chief among those reasons if poor nutrition. The modern diet doesn’t give us all the vitamins and minerals we need to support our best internal health. 

Especially on the cellular level, we are often missing minerals like Magnesium and Zinc that our body uses to create muscle fiber, bone material, and perform metabolic functions.

When we’re not giving our body the micro-nutrients it needs, we’re actually sending signals to our body to stop producing the hormones we need to stay at our best. By giving your body minerals, and important vitamins like the B Complex, you give your cells the necessary building blocks to not only maintain testosterone levels, but also build muscle, burn fat, and stay alert.


We’ve covered the biggest and most important ingredients that we’ve found in all the best and most effective Testosterone Boosters. But many of the great products we’ve reviewed, like Testo-Max and TestoPrime, include other proven and well researched ingredients.

We hope to have taken some of the mystery out of how Testosterone Boosters work, by showing a little bit about some of their key ingredients. If you’d like to learn more, please be sure to follow the links in this article to specific products.


Are Testosterone Boosters Legal?

Absolutely. The supplements we link to and review are all 100% legal. 

Do All Testosterone Boosters Work the Same?

No. While the individual ingredients may work the same, how they’re absorbed into our bodies can vary significantly. Also, how each ingredient works with the others in a formula may affect how well it works for you.

Do I Need a Testosterone Booster?

Only you can answer that question. Many men have found that taking a daily T-Booster helps with energy, focus, drive, and performance. If you feel like you could benefit in any of those areas, then trying a new supplement may be the right way to go.

About the Author

Steven has been into health, nutrition, and fitness for over 10 years, and has a degree in Physical Education and Coaching. He is an expert in supplements and is devoted to helping his clients achieve their fitness goals and live their best lives.

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