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Nugenix Free Testosterone Booster Review: May Be Helpful but Proceed with Caution

By Anastasia Climan, RDN, CD-N

Last Updated on March 6, 2023

Medically Reviewed by Yasmine S. Ali, MD, MSCI

Nugenix Free Testosterone Booster has effective ingredients that are likely to help increase your testosterone levels. But this supplement is not the cheapest, safest, or most effective way to get results.

Written by
Anastasia Climan, RDN, CD-N
Registered Dietitian Nutritionist
Anastasia Climan is a registered dietitian whose career progressed into public health, corporate wellness, and private practice roles. She earned a Bachelor of Science from the University of Connecticut's Coordinated Undergraduate Dietetics Program in 2011. She's led wellness initiatives on HIV/AIDS, children's health, and diabetes.
Medically Reviewed by
Yasmine S. Ali, MD, MSCI, FACC, FACP
Board-certified Cardiologist, Medical Board Member
Yasmine S. Ali, MD, MSCI, is a board-certified cardiologist, clinical lipidologist, and internist with nearly 30 years of experience in direct patient care and 25 years of experience in medical writing, editing, and reviewing.
Nugenix Free Testosterone Booster Review: May Be Helpful but Proceed with Caution
Photo by WellnessVerge

Key Takeaways (TL;DR)

  • Nugenix Free Testosterone Booster has some promising ingredients (especially fenugreek) to increase testosterone levels, muscle mass, and libido.
  • Nugenix’s proprietary blend makes it difficult to know the exact amount of some of the ingredients in this product, especially fenugreek.
  • Although studies showed that zinc and citrulline malate are promising, neither of these ingredients are present in enough amounts in Nugenix to impact testosterone, muscle mass, or libido.
  • There are a lot of positive customer reviews on the Nugenix website, and third-party retailer sites stating the product was helpful.
  • A primary complaint from reviewers about Nugenix is the price (when purchased directly from the brand). Fortunately, you can find Nugenix at better prices from popular retailers such as Walmart, GNC, and Rite Aid.
  • You should not start any supplement that claims to boost testosterone levels without first discussing it with your doctor due to the serious health concerns related to high testosterone levels.

Things Nugenix Gets Right

  • Contains ingredients proven to increase testosterone levels
  • Does not use any stimulants
  • Offers a good return policy

Important Considerations

  • It may be expensive for some people
  • Any testosterone booster comes with safety concerns, especially for long-term use
  • Contains excessive amounts of vitamin B12, which may pose a health risk

The Basics of Testosterone

Testosterone-boosting supplements appeal to men who want to stay strong and vital with age.

Testosterone is a male sex hormone responsible for muscle-building, sex drive, and sperm production. Testosterone levels naturally fluctuate with age, declining in men by 1% each year starting around age 30. (1, 2)

There are different ways that scientists typically measure testosterone levels, including total testosterone and free testosterone. Some of the body’s circulating testosterone is attached to proteins, and some floats around in the bloodstream unattached (free testosterone). The combination of attached and free testosterone is known as total testosterone or total T(1)

Since free testosterone isn’t bound to anything, it can affect tissues around the body. As a result, free testosterone is considered “active testosterone,” which is why supplement companies like Nugenix design products that aim to increase free testosterone levels to keep you feeling young and strong.

Nugenix at a Glance

Nugenix Free Testosterone Booster is a dietary supplement with six ingredients to raise free testosterone levels. It aims to improve exercise performance and recovery and reverse some signs of aging caused by less testosterone, such as reduced muscle mass and sex drive.

After taking the supplement daily, you should see maximum benefits in eight weeks or less, according to the manufacturers.

How to Take It

A serving of Nugenix Free Testosterone Booster is three capsules. You can take the three pills daily, with or without food, at any time of the day.

Click to See the Full Supplement Facts

Each serving of the Nugenix Free Testosterone Booster has three vitamins in the following daily value (DV) percentages:

  • Vitamin B6: 118% DV
  • Vitamin B12: 2083% DV
  • Zinc: 9% DV

The supplement also contains the Nugenix Free Testosterone Complex, which is L-citrulline malate, Fenugreek Extract, and Tribulus Extract.

Cost and Buying Options

A one-month supply costs about $70 on the Nugenix website, but you can save at least $15 by buying it elsewhere (several online and brick-and-mortar retailers sell Nugenix).

Retailer Cost for a 30-Day Supply
Nugenix Website $69.99
Walmart $43.99
Rite Aid $56.99
GNC $57.99

The Nugenix website offers a 100% money-back guarantee for autoship deliveries if you return the product within 30 days (even if the bottle is empty). Standard deliveries can be returned within 90 days but must be unopened and in their original packaging.

Shop Nugenix on GNC

Nugenix Has Effective Ingredients to Raise Your Testosterone Levels and More

There is no research on the specific formulation of this Nugenix product. However, a good amount of scientific research supports using its individual ingredients to boost free testosterone levels, increase lean muscle mass, and help with a stronger sex drive.

Here’s the summary of our research on these ingredients for each of these health benefits:

Free Testosterone Levels

Nugenix contains a proprietary blend of three ingredients, L-citrulline malate, fenugreek seed extract, and Tribulus extract.

Studies show that these ingredients may help to increase free testosterone levels. However, it is unclear if Nugenix contains these ingredients at effective doses. Fenugreek is the most-researched ingredient with a connection to testosterone.

Click to View the Detailed Research

A meta-analysis of four clinical trials concluded that fenugreek extract significantly raises testosterone levels in the blood. One of the included studies noted an effective dose of 500 mg per day. Unfortunately, it’s not clear exactly how much fenugreek Nugenix contains. The proprietary blend in total is listed as 2,103 milligrams per serving. But a breakdown of individual ingredient doses isn’t provided. (3)

Nonetheless, another study also verified that testofen (the type of fenugreek extract in Nugenix Free Testosterone Booster) increases total testosterone levels and free testosterone levels after 12 weeks of supplementation with 600 milligrams per day. (4)

In addition, higher levels of zinc in the body are associated with higher free testosterone levels and normal sperm development. (5) Nugenix contains zinc, but only a small amount. One full serving of Nugenix only covers 9% of the daily required amount of zinc. Therefore, it’s unlikely that the zinc in Nugenix alone would have a significant impact on free testosterone levels.

Lean Muscle Mass

Testosterone is directly linked to the growth and maintenance of muscles (1). Therefore, anything that increases testosterone levels should also help increase muscle mass. Since Nugenix is likely to increase free testosterone levels, it should have beneficial effects on muscle mass as well.

In addition, citrulline malate is an ingredient proven to support muscle growth, but only in much higher doses than what's present in this supplement.

Click to View the Detailed Research

There’s some strong evidence that the ingredient in Nugenix’s proprietary blend, citrulline malate, improves strength training endurance, especially for muscles in the lower body. (6) By boosting the repetitions you can do, citrulline malate may help you have longer workouts to build stronger muscles. However, this evidence is for doses of 6-8 grams per day.

A review of other studies suggests citrulline malate increases blood flow, providing more nutrients to the muscles during exercise and helping speed up the recovery process. (7) Dosages in this group of studies ranged from 800 milligrams to 10 grams per day.

Since there’s a total of 2,103 milligrams of the proprietary blend in Nugenix (with just a portion of that being citrulline malate), there may not be a sufficient dose to offer these benefits.


Testosterone levels are also involved in regulating sex drive, so any positive effects that Nugenix has on raising testosterone levels should also boost libido.

Furthermore, there’s evidence that some of the ingredients in this supplement may help with boosting sex drive specifically.

Click to View the Detailed Research

Testofen is a type of fenugreek in Nugenix that’s been individually studied for its effects on sex drive.

A double-blind, randomized controlled trial involving 120 men found that men taking 600 milligrams daily of testofen (a form of fenugreek found in Nugenix) for 12 weeks had improved sexual function and testosterone compared to the placebo group. (4) Men ages 43 to 70 experienced more morning erections and sexual activity after consistent supplement use.

Nugenix Capsules. Photo by Wellnessverge
Nugenix Capsules. Photo by Wellnessverge

Testosterone Boosters Come with Considerable Safety Risks

It’s important to keep in mind that you should not start any supplement that claims to boost testosterone levels without first discussing it with your doctor due to the serious health concerns related to high testosterone levels.

Nugenix hasn't been tested for safety, and the long-term effects are unknown. Additionally, there's no third-party certification of its ingredients or quality. This supplement is only intended for adult males over 18 years old.

Research suggests that you should avoid fenugreek-containing supplements if you have a chickpea or peanut allergy. (8) In animal studies, fenugreek negatively affected male fertility (and pregnancy outcomes). Men should speak to their doctor before starting a fenugreek supplement, especially if they want more children or have concerns about testicular health.

Elevated testosterone levels through testosterone supplementation have also been shown to cause cardiovascular events, like heart attacks and coronary artery disease, particularly in older men. (9)

Nugenix also contains a very high dose of vitamin B12 (2,083% of the recommended daily value). Studies suggest that high B12 levels could increase cancer risk. (10)

How Nugenix Compares to Alternatives

Many men want to stay strong and vital with age, and many brands offer products that are promised to raise testosterone levels naturally.

However, there’s limited evidence to support the effectiveness of most of these products. (11) Studies show that over 75% of supplements marketed to raise testosterone levels don’t have reliable data proving they actually work. (12)

That’s why we recommend researching, proceeding cautiously, and consulting your doctor.

To help your research, here’s how Nugenix Free Testosterone Booster compares to products with similar ingredients.

Nugenix Free Testosterone Booster vs. Nugenix Total-T

A similar product from the same brand is the Nugenix Total-T. It may be a better option because it contains an effective dose of fenugreek for raising free testosterone levels and libido and has a safer dose of B12. The price on the Nugenix website is the same for both products – $69.99 for a 30-day supply.

Nugenix vs. Other Brands

If you are set on purchasing a testosterone booster, we recommend looking into products that provide specific amounts of each ingredient. Here's how Nugenix measures up to other brands:

Nugenix Free Testosterone Booster



Roman Testosterone Support

Key Ingredients

Vitamin B6, Vitamin B12 (high dose), L-Citrulline malate, Fenugreek Extract, Tribulus Extract

Magnesium, Zinc, Boron

KSM-66 Ashwagandha, Forkskolii Root Extract, Inositol & Glycine, L-Theanine & Bioperine

D-aspartic acid, Fenugreek Extract, Vitamin D3, Zinc

Korean Red Ginseng Extract, Boron, Nettle Leaf Extract, Magnesium

Vitamin D3, Zinc, Magnesium, Ashwagandha, Maca, Copper

Marketing Claims

Boosts free testosterone

and Increases muscle mass and sex drive

Stimulates testosterone production, Improves strength and muscle gain, Optimizes sleep and recovery

Boosts energy levels

Boost energy and beat fatigue, Get more from your workouts, Build muscle and strength, Burn stubborn body fat, Revive your sex life

Supports male virility and testosterone production

Price for 1-Month Supply





Discounted Price

$49.36/month (if you buy a 60-day supply from Amazon for $98.79)

$47.39/month if you “subscribe to save”

$119.99 for 3 months = $40/month

$179.99 for 5 months = $36/month

$87 for 3 months = $29.00/month

You can also use a $25 off promo code on your first purchase











Consider This Before Taking Nugenix

About 40% of men over age 45 are estimated to have low testosterone levels (known as low-T). Before trying any testosterone supplement, you should meet with your doctor to have your levels tested. (2)

Testosterone treatment therapy is available by prescription through various methods, such as:

  • Daily testosterone patches or gels applied to the skin
  • Slow-release pellets implanted under the skin every two months
  • Testosterone injections every 10 to 14 days

Your doctor can determine if you're a good candidate for testosterone replacement. The benefit of these prescription methods is that they are given in controlled dosing, and you know exactly what you are getting. You are also monitored under medical supervision. Your clinician can monitor you for signs of adverse effects by screening for things like prostate cancer, red blood cell changes, or a lower sperm count. (2)

Sometimes low testosterone levels are caused by a genetic disease. Testosterone levels are also affected by lifestyle factors, like alcohol intake and body weight. It's essential to figure out what's causing low testosterone levels before deciding on the next steps. (1)

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At WellnessVerge, we only use reputable sources, including peer-reviewed medical journals and well-respected academic institutions.

  1. Testosterone Levels Test: MedlinePlus Medical Test:
  2. Low Testosterone (Low T): Causes, Symptoms & Treatment:
  3. Effect of fenugreek extract supplement on testosterone levels in male: A meta-analysis of clinical trials - PubMed:
  4. Testofen, a specialised Trigonella foenum-graecum seed extract reduces age-related symptoms of androgen decrease, increases testosterone levels and improves sexual function in healthy aging males in a double-blind randomised clinical study – Taylor & Francis Online:
  5. Zinc Levels in Seminal Fluid in Infertile Males and its Relation with Serum Free Testosterone - PMC:
  6. Acute Effect of Citrulline Malate on Repetition Performance During Strength Training: A Systematic Review and Meta-Analysis in: International Journal of Sport Nutrition and Exercise Metabolism Volume 31 Issue 4 (2021):
  7. Effects of Citrulline Supplementation on Exercise Performance in Humans: A Review of the Current Literature - PubMed:
  8. Toxicological properties of fenugreek (Trigonella foenum graecum) - PubMed:
  9. Testosterone therapy, association with age, initiation and mode of therapy with cardiovascular events: a systematic review - PubMed:
  10. Is high vitamin B12 status a cause of lung cancer? – Wiley Online Library:
  11. Testosterone Imposters: An Analysis of Popular Online Testosterone Boosting Supplements - PMC:
  12. ‘Testosterone Boosting’ Supplements Composition and Claims Are not Supported by the Academic Literature – The World's Journal of Men's Health: