Buy 1 Get 1 25% off Protein. Discount applied at checkout. Offer valid at SixStarPro.com only through December 31, 2025. Promo excludes stacks. Cannot be combine with other offers. Limited time only.
Developed exclusively for athletes to boost testosterone and enhance training performance.
INCREASE TESTOSTERONE IN 7 DAYS▲,1
Formulated with a precise dose of the mineral boron, which is shown to increase active testosterone in just 7 days.
PEAK TEST: CORTISOL RATIO▲,2
A unique plant-based blend has been shown in a human clinical study to help maintain peak testosterone-to-cortisol ratio after intense training.
SUPPORTS TRAINING PERFORMANCE▲,2
SIXSTAR Testosterone Booster contains a blend of ingredients shown to support training performance by protecting against fatigue.
CLINICALLY ADVANCED
Formulated for athletes, a key ingredient is shown in a human clinical study to amplify your body’s testosterone within the normal range.
▲These elements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
1Six Star® Testosterone Booster is formulated with a precise dose of mineral boron, which is shown in human clinical research to increase active (free) testosterone in just 7 days.▲
2Six Star® Testosterone Booster is also scientifically engineered with a unique, plant-based blend shown in a 7-week human clinical study to help maintain peak testosterone-to-cortisol ratio after an intense exercise test. Cortisol is a hormone released due to stress that can break down muscle tissue. Test subjects also enhanced performance as determined by a marker of exercise capacity.▲
What's inside the bottle?
Get to know the lineup
The best teams have chemistry. Check out the standouts on the Testosterone Booster roster.
386mg
RHODIOLA EXTRACT
SUPPORT PERFORMANCE
SIXSTAR Testosterone Booster features a blend of scientifically researched ingredients including rhodiola extract and ginko, to support training performance.
ANTI-CATABOLIC
COMPLEX
PEAK TEST TO CORTISOL RATIO
Released due to stress, cortisol is a catabolic hormone that can limit size and strength by promoting muscle breakdown. A peak testosterone to cortisol ratio helps to ensure you reap the performance, strength, and growth benefits of testosterone.
100mg
BORON CITRATE
INCREASE TESTOSTERONE PRODUCTION
Boron Citrate is a franchise player—around which to build your roster. Scientifically shown to increase free testosterone levels and decrease estradiol levels, the mineral boron promotes your body’s increased natural production of testosterone within the normal range.
Who is sixstar for?
Athletes who make it happen
If the extra mile were a place on a map, SIXSTAR would hold naming rights. For more than a decade, we’ve offered clinically dosed sports performance products custom formulated for athletes that go longer, work harder, and give more than anyone else.
Take SIXSTAR everywhere
At home or on the road, SIXSTAR goes anywhere you do. Looking to improve your game? It’s the perfect companion on the journey to be your best.
At the gym
On the Field
On the court
On the pitch
At the ballpark
At the track
Got questions? We've got your covered
Clear, helpful answers for anyone getting started with Testosterone Booster—and looking to get the most out of it.
What is Testosterone?
Testosterone is a hormone found in humans, as well as in other animals. In men, the testicles primarily produce testosterone. Women's ovaries also produce testosterone, though in much smaller amounts. This hormone is key to the development of male growth and masculine characteristics.
How to Increase Testosterone?
Exercise regularly, especially with weightlifting and high-intensity interval training (HIIT).
Eat a balanced diet rich in proteins, fats, and carbohydrates.
Manage stress effectively to reduce cortisol levels, which can impact testosterone.
Ensure sufficient vitamin D intake and maintain a healthy weight.
Getting quality sleep as poor sleep can reduce testosterone levels.
Consider taking supplements
What Does Testosterone Do?
Testosterone helps regulate sex drive (libido), bone mass, fat distribution, muscle mass and strength, and the production of red blood cells and sperm.
How to Check Testosterone Levels?
Testosterone levels can be checked through a blood test known as a serum testosterone test, typically conducted in the morning when testosterone levels are highest.
Where is Testosterone Produced?
In men, testosterone is primarily produced in the testicles. In women, it's produced in the ovaries and adrenal glands, albeit in much smaller quantities.
Hypogonadism, a dysfunction of the testicles or pituitary gland.
Obesity, significant weight gain can impact hormone production.
Chronic diseases, like type 2 diabetes, liver or kidney disease.
Certain medications can also lower testosterone.
What Foods Increase Testosterone?
Foods rich in vitamin D, zinc, and omega-3 fatty acids can help increase testosterone levels. Examples include tuna, salmon, egg yolks, fortified milk and cereals, oysters, shellfish, beef, and beans.
How to Tell if You Have Low Testosterone?
Symptoms of low testosterone may include low sex drive, difficulty with erection, low semen volume, hair loss, fatigue, loss of muscle mass, increased body fat, decreased bone mass, mood changes, and affected memory.
What Decreases Testosterone?
Factors like excessive alcohol consumption, stress, poor diet, lack of exercise, and certain medications can decrease testosterone levels.
How Long Does it Take for Testosterone to Work?
The effects of testosterone replacement therapy can be noticed as early as three weeks but might take up to six months for the full range of benefits to be experienced.
What Are Signs of Low Testosterone?
Signs include low libido, fatigue, reduced muscle mass, erectile dysfunction, depression, concentration difficulties, and loss of body hair.
Improving lifestyle factors such as diet, exercise, sleep, and stress management can positively influence testosterone levels. However, for cases of significantly low testosterone or hypogonadism, it's crucial to seek medical advice for appropriate treatment options.
Who is sixstar for?
Athletes who make it happen
If the extra mile were a place on a map, SIXSTAR would hold naming rights. For more than a decade, we’ve offered clinically dosed sports performance products custom formulated for athletes that go longer, work harder, and give more than anyone else.
Take SIXSTAR everywhere
At home or on the road, SIXSTAR goes anywhere you do. Looking to improve your game? It’s the perfect companion on the journey to be your best.
At the gym
On the Field
On The Court
On the pitch
At the ballpark
At the track
At the gym
On the Field
On the court
On the pitch
At the ballpark
At the track
Can I stack this?
Set your lineup
Developed for athletes, these great products make for greater additions to your game day roster, helping you to maximize your performance on the field, the court—or the rink.
Customers also bought
Built for Athletes Like You
Real stories from real users—learn how Testosterone Booster helps them train harder, recover faster, and keep making progress.
Enhanced Training!
Overall Great Product! Quality Ingredients such as Boron and Rhodiola that have been shown to increase testerone levels which helps create and maintain muscle mass! Tablets are easy to take and offer a good quantity that is inexpensive
RX_Camacho
El Paso, Texas
*Received as a free product
Highly recommend
This is a must have added to my supplement routine. As a man, this just gives you the extra boost in areas that you may need or are struggling with. They are super easy to take and it has great added benefits. Very pleased with how well these have been working since I started taking them.
Ch87
KS
*Received as a free product
Will look at getting more
great product. I mean I have been taking this for a while(2 weeks maybe) I am not 100% sure how much this is working but I have noticed a slightly more elevated training performance. But I have noticed a bit more gain after a few weeks with my current training regiment.
Illa
Rochester, NY
*Received as a free product
Reviews
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