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TestoGen Review: Is It Safe and Effective?

Written by Melissa Mitri, MS, RD

Reviewed by Anthony Dugarte, MD 

Last Updated on April 15, 2021

Our Expert Rating:


About This Rating
The average rating of this product is calculated based on the evaluation of the following factors:
  • Support for Claims:3.0
  • Ingredient Safety:3.0
  • Value for the Price:2.0
  • Brand Transparency:4.0

While TestoGen does contain some ingredients that may increase testosterone levels, it doesn’t appear to be in adequate amounts to make a difference.

TestoGen Review: Is It Safe and Effective?


  • Antioxidant and anti-inflammatory
  • 100-day money-back guarantee
  • Clear contact information on website


  • Questionable effectiveness of ingredients in provided amounts
  • Unknown side effects with long-term use
  • Some ingredients may interact with medications

What Is TestoGen?

TestoGen is a testosterone booster that claims to increase muscle size and strength and boost libido and sexual performance. This product is designed for men 18 years of age and older.

The product claims that the combination of the eleven ingredients works together to naturally increase your testosterone levels in your body without having to take testosterone itself.

As men age, testosterone levels naturally decline. This can lead to reduced energy, decreased libido, and muscle loss.

While many of the ingredients in TestoGen are natural and shown to have minimal side effects, it is unclear if they actually work in the present doses.

There are 3 research studies cited on the product website, but 2 out of the 3 are from over 10 years ago and are very small. This leads me to believe there is no strong evidence to support product claims.

Evaluation of Ingredients

TestoGen contains 11 total ingredients. For simplicity’s sake, I will list the top 6 core ingredients as the others are in very minimal amounts.

1. D-aspartic Acid, 2,352 mg

D-aspartic acid is a unique amino acid that helps to make and release hormones such as testosterone.

Most studies on D-aspartic acid and testosterone are animal studies. A few human studies have shown inconsistent results.

Additionally, the doses that were given in most studies were over 3,000 mg, which is higher than what is present in TestoGen.

2. Magnesium, 200 mg

Magnesium is a mineral that has many health benefits, including it being a powerful antioxidant.

One study showed that magnesium may be involved in supporting normal levels of anabolic hormones such as testosterone.

However, this study showed more of an association, not necessarily a cause-and-effect type of relationship.

Magnesium in supplement form may also come with side effects such as gas or diarrhea.

3. Vitamin D3, 50 mcg

Vitamin D3 is a very important nutrient involved in regulating hormone levels and overall health.

One study showed that those taking a vitamin D supplement had higher testosterone levels than those who didn’t.

However, the dose given was over 80 micrograms, higher than what is actually present in TestoGen.

It is common to be deficient in Vitamin D. However, the amounts present in TestoGen are probably not sufficient to correct an actual deficiency if you had one.

4. Nettle Leaf Extract, 40 mg

Nettle leaf extract, otherwise known as “stinging nettle,” is a plant that may help to increase free testosterone levels in the body.

There have been a few studies done on nettle leaf and testosterone levels, but most have been small and mainly animal studies.

5. Korean Red Ginseng Extract, 40 mg

Korean red ginseng is a plant native to China that some say may help improve erectile dysfunction.

However, it may also interact with certain medications.

6. Fenugreek Extract, 40 mg

Fenugreek is an herb that acts as an antioxidant. One 12-week study showed that those taking 500 mg of Fenugreek daily had improved testosterone levels.

However, this is a much higher dose than the 40 mg of Fenugreek present in TestoGen.

It is therefore difficult to determine if it would produce the same effect in those taking TestoGen.

Verdict on Claimed Benefits

Below is our summary of the available evidence for the claimed benefits of TestoGen based on the available research:

  • Increase muscle sizeModerate Evidence
  • Improve energyModerate Evidence
  • Boost libidoModerate Evidence

Cost and Where to Buy

The price of TestoGen is pretty similar to other testosterone boosters on the market.

TestoGen costs $59.00 for a 30-day supply. You can also purchase a 3-month supply and get 2 additional months free.

Therefore, a 5-month supply would cost $179, which saves close to $30 per month compared to ordering for just one month.

You can purchase TestoGen directly from the manufacturer or on Amazon for essentially the same price.

If you decided to purchase it, I would suggest buying it from the product website to secure the 100-day money-back guarantee.

Side Effects, Safety, and Dosage

The dosage recommendation is 4 capsules once per day, 20 minutes before breakfast.

Possible side effects of the ingredients present include:

  • Bloating
  • Diarrhea
  • Nausea
  • Headaches
  • Cramping

However, the ingredient doses present are fairly low compared to doses given in research studies that were shown to be safe.

While it may not be effective because of this, this does make me feel a little more comfortable with its overall safety profile.

One concern I do have is that certain ingredients such as ginseng may interact with blood pressure, diabetes, and blood-thinning medications.

Those taking any prescription medications or who have pre-existing medical conditions should speak to their doctor before trying TestoGen.

How It Compares

There are many testosterone boosters on the market, many with a proprietary ingredient blend such as TestoGen.

TestoGen is unique in that it contains nettle leaf extract, which is not present in most other boosters I researched.

Nettle leaf extract has been shown in a few small studies to boost free testosterone levels, but most have been mainly tested in animals.

The ingredients seen in testosterone boosters, in general, can vary. Some common ingredients include D-aspartic acid, fenugreek, B-vitamins, amino acids, zinc, ginseng, berry extract, or longjack root. 

Test Boost Max and TestoFuel are two other comparable testosterone boosters out there.

Test Boost Max is priced lower than TestoGen – $41 per month compared to $59.

Test Boost Max contains ashwagandha and longjack root, 2 ingredients that may increase testosterone.

However, the dose of these ingredients is lower than what has shown to be effective in any of the studies done.

TestoFuel is more costly at $65 per month and has similar efficacy to TestoGen. 

All in all, TestoGen is fairly comparable to other similar products in that there is not enough strong research to prove it works.

Based on the available research, testosterone boosters, in general, have not yet seen to be widely effective in humans for improving testosterone levels.

The Bottom Line

TestoGen contains some ingredients that may benefit health. However, most of them are in very low doses compared to what is shown to be effective.

The lower dosage makes me feel less concerned with major side effects but also makes me question its effectiveness.

If you are worried about your testosterone levels, I would consult with your physician to see what lifestyle factors or prescription medications you may need. These would likely be more effective.

A Word from Our RD

If you have any pre-existing health conditions or take prescription medications, I would suggest speaking to your doctor first or avoiding this product.

A healthy lifestyle consisting of a nutritious diet for hormone balance, regular exercise, stress management, and adequate sleep can support healthy testosterone levels without the need for additional supplements.

I always recommend starting with lifestyle changes first, as they are more effective with fewer side effects.

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