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Training performance support; Stress and fatigue support; Healthy free testosterone levels within the normal range
Active adults and athletes seeking support for training performance and those wanting daily support for healthy free testosterone levels within the normal range.
Take 2 caplets with a glass of water, twice daily; do not exceed 4 caplets in 24 hours. Consider taking earlier in the day as rhodiola may feel stimulating for some people.
Contains bioengineered food ingredients. Made in the U.S.A. from domestic and international ingredients.
Boron may influence steroid hormone metabolism and reduce sex hormone–binding globulin, which can increase the proportion of free testosterone within the normal range.
Caution: Take only as directed since higher intakes may cause digestive discomfort; individuals with hormone-sensitive conditions should consult a professional due to boron’s effects on hormone pathways.
Rhodiola’s salidrosides are studied for supporting cellular energy and stress resilience by influencing neurotransmitters and stress-response pathways, which may help moderate exercise-induced fatigue.
Caution: May be stimulating for some people; avoid close to bedtime and start with the suggested serving to assess tolerance.
Ginkgo flavonoids and terpene lactones are associated with supporting blood flow and antioxidant activity, which may help with exercise-related oxygen delivery and stress from free radicals.
Caution: May interact with blood-thinning agents; discontinue use before surgery and consult a professional if using anticoagulants.
Boron supports healthy free testosterone levels, while rhodiola helps the body respond to physical stress and fatigue during training. Ginkgo adds circulatory and antioxidant support, complementing rhodiola’s stress-response actions for exercise performance.
Label Warning: For adult use only. Do not use if pregnant or nursing. Consult a medical doctor if you have a medical condition or before starting any diet or exercise program. Not intended for low testosterone or sexual dysfunction.
Who should be cautious: People with medical conditions or using medications may want to discuss use with a healthcare provider. Those sensitive to stimulants may monitor for effects from rhodiola. Individuals with bleeding concerns or on anticoagulants may use caution due to ginkgo.
Storage: Store in a cool, dry place at 60°F to 80°F.
Many users felt more energy, strength, and better gym performance within days, with less post-exercise fatigue.
Caplets are reported as easy to swallow and simple to add to a routine.
A few users did not notice meaningful changes or the desired effects.
This product is guaranteed authentic and backed by our easy returns & refunds policy. Details
Omega-3s may support heart health and reduce inflammation, which can be beneficial for overall men's health and testosterone levels.
AI generated. Not medical advice.
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Formulated for Athletes
Six Star® Testosterone Booster is formulated with a key ingredient shown in a human clinical study to amplify your body's testosterone production within the normal range. It also contains a blend of ingredients shown to support training performance by protecting against fatigue.
Increase Testosterone & Training Performance
¹Six Star® Testosterone Booster is formulated with a precise dose of the 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.
Take 1 serving (2 caplets) with a glass of water 2 times daily. Do not exceed 4 caplets in a 24-hour period. Read the entire label before use and follow directions provided.
Microcrystalline cellulose, dicalcium phosphate dihydrate, stearic acid, croscarmellose sodium, coating (polyvinyl alcohol, titanium dioxide, polyethylene glycol, talc), crospovidone, silicon dioxide, magnesium stearate.
Contains bioengineered food ingredients.
Made in the U.S.A. from domestic and international ingredients.
For adult use only. Do not use if pregnant or nursing. Consult a medical doctor if you have a medical condition or before starting any diet or exercise program. Keep out of reach of children.
Not intended to treat low testosterone or sexual dysfunction.
Do not use if this packaging has been tampered with. Store in a cool, dry place (60°F to 80°F).
While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by iHerb.
| Supplement facts | ||
| Serving Size: 2 Caplets | ||
| Servings Per Container: 30 | ||
| Amount Per Serving | %Daily Value | |
| Total Carbohydrate | <1 g | <1%* |
| Calcium | 50 mg | 4% |
| Sodium | 10 mg | <1% |
| Anti-Catabolic Complex | ||
| Rhodiola extract (as Rhodiola crenulata) (root) | 385 mg | † |
| Standardized for salidrosides | ||
| Ginkgo extract (as Ginkgo biloba) (leaf) | 2.8 mg | † |
| Free (Active) Testosterone Stimulator | ||
| Boron citrate | 100 mg | † |
| Supplying 5 mg of boron | ||
| *Percent Daily Values are based on a 2,000 calorie diet. †Daily Value not established. | ||
