Which supplement is believed to enhance endurance but increases weight and lacks androgenic effects such as gynecomastia or acne?

Which supplement is believed to enhance endurance but increases weight and lacks androgenic effects such as gynecomastia or acne?

• A. Creatine
• B. DHEA
• C. Ephedra
• D. Growth hormone

Answer: (A)

Creatine works by increasing the muscle's phosphocreatine stores, which speeds the regeneration of ATP during short, high‑intensity efforts. This can translate into better performance in repeated bursts of activity and sustained high‑intensity work, which athletes often interpret as an endurance benefit in certain contexts. The weight gain that accompanies creatine is primarily due to water drawn into muscle cells and a modest gain in lean mass, not fat. Because creatine is not a hormone or steroid, it does not cause androgenic effects such as gynecomastia or acne, which aligns with the description in the question. DHEA is a hormone precursor that can convert to androgens or estrogens, so it can have androgenic effects and its endurance benefits are not reliably proven. Ephedra is a stimulant that can boost energy and performance but carries cardiovascular risks and is not associated with the specific pattern of weight gain described. Growth hormone affects body composition and can increase lean mass, but its use for endurance is not typical and it comes with its own risk profile, not matching the described combination of endurance enhancement with weight gain and no androgenic effects.

Creatine works by increasing the muscle's phosphocreatine stores, which speeds the regeneration of ATP during short, high‑intensity efforts. This can translate into better performance in repeated bursts of activity and sustained high‑intensity work, which athletes often interpret as an endurance benefit in certain contexts. The weight gain that accompanies creatine is primarily due to water drawn into muscle cells and a modest gain in lean mass, not fat. Because creatine is not a hormone or steroid, it does not cause androgenic effects such as gynecomastia or acne, which aligns with the description in the question.

DHEA is a hormone precursor that can convert to androgens or estrogens, so it can have androgenic effects and its endurance benefits are not reliably proven. Ephedra is a stimulant that can boost energy and performance but carries cardiovascular risks and is not associated with the specific pattern of weight gain described. Growth hormone affects body composition and can increase lean mass, but its use for endurance is not typical and it comes with its own risk profile, not matching the described combination of endurance enhancement with weight gain and no androgenic effects.