• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
We have independently evaluated the products and services below. We may earn affiliate revenue from links in the content.

Trendingnow

1

As U.S. Treasury intervened in the bond market, the Netherlands rushed 86 tons of gold out of America because of ‘geopolitical unrest’

2

Current price of silver as of Thursday, September 3, 2026

3

'Critical employees will begin to retire': Trump’s new pay plan will deny most federal roles a raise, and it has workers warning of a retention crunch

1

As U.S. Treasury intervened in the bond market, the Netherlands rushed 86 tons of gold out of America because of ‘geopolitical unrest’

2

Current price of silver as of Thursday, September 3, 2026

3

'Critical employees will begin to retire': Trump’s new pay plan will deny most federal roles a raise, and it has workers warning of a retention crunch
HealthDietary Supplements

Testosil Review (2026): Testosterone Supplement Reviewed

Christina Snyder
By
Christina Snyder
Christina Snyder
Health Commerce Staff Writer
Down Arrow Button Icon
Christina Snyder
By
Christina Snyder
Christina Snyder
Health Commerce Staff Writer
Down Arrow Button Icon
June 11, 2026, 4:06 PM ET
Updated August 26, 2026, 1:40 PM ET
Google source logo
Add Fortune on Google for similar content.

Optimizing your hormone health isn’t vanity. It can actually give you a competitive advantage over your peers. How? Research from Harvard suggests that declining testosterone levels may cause brain fog and reduced mental stamina, so it may be a good idea to add a testosterone supplement to your performance stack.

While testosterone boosting supplements should not be a replacement for physician-directed use of testosterone replacement therapy (TRT), they can be helpful. Pete, our team’s certified nutrition coach, tested Testosil, a 100% natural testosterone booster. Read on for our full review of the formulation, effectiveness, value, and more.

Why Trust Fortune

Our team of expert testers has tried hundreds of the most popular supplements on the market today, using our comprehensive supplement testing methodology to find the best products for all folks.

3.5

Testosil

Serving size

4 capsules

Key ingredients

KSM-66® Ashwagandha, Fenugreek Extract, D-Aspartic Acid, Tribulus Terrestris, Zinc, Magnesium, AstraGin, and more

Form

Capsules
Check price on Testosil
Testosil

Our thoughts: We love the vitamins and minerals in this supplement, and our tester didn’t have any negative side effects after taking it

Who it's for: Busy male professionals looking to boost testosterone levels for energy and longevity

What makes it different: Includes ashwagandha, which may help raise testosterone levels by lowering cortisol

PROS
  • Money-back guarantee
  • Free shipping in the continental USA
  • Includes several vitamins and minerals
CONS
  • The most recent COA (lab testing analysis) available on Testosil’s website is from 2024
  • Not available in stores; only online
  • Pricey, though you can buy multiple bottles at a discount

Testosil Specs

SpecsDetails
Price$79
Key ingredientsAshwagandha, Fenugreek Extract, D-Aspartic Acid, Tribulus Terrestris, Zinc, Magnesium, AstraGin
FormCapsules
Third-party testingYes
Cost per serving$2.63
Serving size4 capsules
Price
Details$79
Key ingredients
DetailsAshwagandha, Fenugreek Extract, D-Aspartic Acid, Tribulus Terrestris, Zinc, Magnesium, AstraGin
Form
DetailsCapsules
Third-party testing
DetailsYes
Cost per serving
Details$2.63
Serving size
Details4 capsules

Our Experience with Testosil 

Testostil is a testosterone boosting supplement that is third-party tested and made in a cGMP certified manufacturing facility, which is also FDA-registered and inspected. It contains 100% natural ingredients and no proprietary blends, so you know exactly what the ingredients are and how much of them you’re taking. Testosil’s key ingredients that may help increase testosterone levels include KSM-66 (ashwagandha), Fenugreek seed extract, zinc, and more.

Our certified nutrition coach Pete tried out Testosil himself. Here’s what he liked and what he suggests could be improved about the product.

What We Liked 

Here’s what our tester rated highly after trying Testosil.

  • First impressions (5 out of 5): “Testosil comes in a medium-size, black plastic container,” said Pete. “The label is matte black and easy to read, and the container opens and closes easily.”
  • Side effects (5 out of 5): Pete didn’t experience any side effects after trying Testosil. “Keep in mind that you would need to do bloodwork to assess whether there was any increase in testosterone after using this product,” said Pete.

What We Would Change

Here’s what Pete would improve about Testosil.

  • Instructions and ease of use (3 out of 5): The directions say to take one to two servings daily, which is four to eight capsules. Pete rated this category lower because of the high pill dosage, which could be a detractor for anyone who has a hard time swallowing capsules. The directions also state not to exceed eight capsules in a 24-hour period, and that the pills are best taken with meals.
  • Value (1 out of 5): A one month’s supply of Testosil costs $79, and each serving comes out to $2.63. This is on the higher end compared to other testosterone boosters that our team tested, which cost around $2.00 per serving.

Who It’s For & Who It’s Not For

Testosil may work well for some and not for others. Here’s a breakdown of when we think it will work well and when we think you might want to shop around more.

Who Testosil is forWho Testosil may not be ideal for
– Men looking for a 100% all-natural testosterone booster– Men with clinically confirmed low levels of testosterone, who may benefit from testosterone replacement therapy (TRT)
– Folks who prefer a testosterone supplement, rather than a prescription or injection– Folks with heart, liver, kidney, or gastrointestinal issues
– Men who want a testosterone booster with clearly described supplement facts and ingredient amounts, as opposed to proprietary blends
– Men looking for a 100% all-natural testosterone booster– Men with clinically confirmed low levels of testosterone, who may benefit from testosterone replacement therapy (TRT)
– Folks who prefer a testosterone supplement, rather than a prescription or injection
Who Testosil may not be ideal for– Folks with heart, liver, kidney, or gastrointestinal issues
– Men who want a testosterone booster with clearly described supplement facts and ingredient amounts, as opposed to proprietary blends
Who Testosil may not be ideal for

Pro Tip

It’s best to get bloodwork done before purchasing any hormone supplements. We’d recommend getting a full hormone panel (total testosterone, free testosterone, SHBG, LH, FSH, and estradiol) done first. Then you can work with a concierge medicine doctor or a men’s health specialist to ensure you’re taking a data-driven approach to enhance your focus, energy levels, and productivity.

If Testosil ends up being the right fit for you, you can take it in conjunction with other products geared toward men’s health and wellness, such as the best multivitamins for men and the best hair loss treatments for men.

Comparing Testosil to Other Products

Below, compare the similarities and differences between Testosil and some of the other best testosterone boosters.

Testosterone SupplementKey IngredientsServing SizeThird-Party Testing
TestosilKSM-66® Ashwagandha, Fenugreek Extract, D-Aspartic Acid, Tribulus Terrestris, Zinc, Magnesium, AstraGin, and more4–8 capsulesYes
Juvenon Alpha Gold MaleKSM-66, Saw Palmetto Fruit Extract, Boron Citrate, Fenugreek Seed Extract2 capsulesYes
Innerbody Labs Testosterone SupportAshwagandha (KSM-66®), Fenugreek extract, Tongkat Ali (Eurycoma longifolia), Maca root, Zinc, Vitamin D (cholecalciferol), Copper4 capsulesYes
Testosil
Key IngredientsKSM-66® Ashwagandha, Fenugreek Extract, D-Aspartic Acid, Tribulus Terrestris, Zinc, Magnesium, AstraGin, and more
Serving Size4–8 capsules
Third-Party TestingYes
Juvenon Alpha Gold Male
Key IngredientsKSM-66, Saw Palmetto Fruit Extract, Boron Citrate, Fenugreek Seed Extract
Serving Size2 capsules
Third-Party TestingYes
Innerbody Labs Testosterone Support
Key IngredientsAshwagandha (KSM-66®), Fenugreek extract, Tongkat Ali (Eurycoma longifolia), Maca root, Zinc, Vitamin D (cholecalciferol), Copper
Serving Size4 capsules
Third-Party TestingYes

Frequently asked questions

Does Testosil actually work?

To see if Testosil works, we recommend getting bloodwork done of your testosterone levels before starting it, and after using it for a little while, so you can see if there are any changes. It usually takes 3 to 6 weeks to see slight to moderate results such as improved mood and sex drive. More noticeable results such as increased muscle mass usually occur within 3 to 6 months.

Do any testosterone boosters actually work?

A 2023 review study found that most testosterone boosters don’t make meaningful change in testosterone levels. Some exceptions are noted in the study, such as beta-hydroxy-methylbutyrate and betaine, which may be effective for male athletes.

Can you boost your testosterone naturally?

Eating healthy whole foods, exercising, and getting quality sleep may help. Try to lower stress when possible, too, as lower cortisol levels can negatively impact testosterone levels. Some initial studies have found that Vitamin D may help raise your testosterone levels, though more research is needed. We also recommend taking a men’s multivitamin supplement to ensure your recommended daily values are being met.

Fortune Daily breaks the traditional barrier between audience and newsroom. The show transforms Fortune’s trusted reporting into actionable, conversational, and entertaining insights for an emerging class of business leaders. Watch here.
About the Author
Christina Snyder
By Christina SnyderHealth Commerce Staff Writer

Christina is a health commerce staff writer at Fortune with more than a decade of experience crafting engaging content for digital platforms.

See full bioRight Arrow Button Icon

Latest in Health


Most Popular

Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • World's Most Admired Companies
  • See All Rankings
  • Lists Calendar
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • TikTok icon
  • YouTube icon

    Latest in Health


    Most Popular

    © 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
    FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.