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Male vitality, training performance, stress and fatigue support, focus
Active adults with intense training schedules or those seeking support for energy and focus during workouts.
Take 2 caplets with water twice daily; do not exceed 4 caplets in 24 hours. Consider taking with food if stomach sensitivity occurs, and avoid taking rhodiola-containing products late in the day if you are sensitive to stimulatory herbs.
Contains bioengineered food ingredients. Processed in a facility that also processes: milk, wheat, egg, fish, peanuts, crustaceans, shellfish, tree nuts, soy and sesame.
Boron may influence steroid hormone metabolism and sex hormone-binding globulin, which can increase the proportion of circulating free testosterone within the normal range.
Caution: Higher intakes may cause gastrointestinal discomfort; avoid combining with multiple boron-containing products to prevent excessive total intake.
Rhodiola’s salidrosides are studied for supporting cellular energy and stress resilience by influencing stress-response pathways and neurotransmitters, which may help reduce perceived fatigue.
Caution: May be stimulating for some; avoid close to bedtime and discontinue if jitteriness or sleep disturbance occurs.
Ginkgo flavonoids and terpenes are associated with supporting blood flow and antioxidant activity, which may aid focus during demanding tasks.
Caution: May interact with medicines that affect blood clotting; stop use and consult a professional before surgery or if bruising occurs.
Boron supports a higher proportion of free testosterone within the normal range, while rhodiola focuses on stress and fatigue pathways to help sustain training intensity. Ginkgo adds circulatory and antioxidant support, which may help with mental focus during workouts.
Label Warning: For adults only. Do not use if pregnant or breastfeeding. Consult a medical doctor if you have a medical condition or before starting any diet or exercise programme. Not intended for low testosterone or sexual dysfunction.
Who should be cautious: People with hormone-sensitive conditions, bleeding concerns, or on medications that may affect blood clotting may wish to be cautious due to ginkgo. Those sensitive to stimulatory herbs may be cautious with rhodiola. If you take medications that may interact, discuss with a healthcare provider before use.
Storage: Store in a cool, dry place at 15°C to 27°C.
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.
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 programme. 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 be despatched with alternative packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and do not rely solely on the information provided by iHerb. This website has been machine translated as a courtesy to customers. iHerb does not represent or warrant that the translations are complete or error-free and iHerb is not responsible for any translation errors or omissions.
| Supplement information | ||
| Serving Size: 2 Caplets | ||
| Servings Per Container: 30 | ||
| Amount per serving | %Reference Intake | |
| Total carbohydrates | <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. †Reference intake not established. | ||
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.
