What are the most effective supplements for increasing stamina and reducing fatigue during long, intense mountain bike rides? Are branched-chain amino acids (BCAAs) really the way to go, or are they just another overhyped marketing gimmick? Ive heard some guys swear by beta-alanine for its supposed ability to delay the onset of fatigue, but Ive also seen some studies that suggest its nothing more than a placebo. What about creatine - is it just for roadies looking to shave off a few seconds, or can it actually benefit us trail riders too? And lets not forget about nitric oxide boosters - do they really help with endurance, or are they just a bunch of hype? Im looking for some real-world advice here, so lets hear from the experts - what supplements have you found to be the most effective for increasing stamina and reducing fatigue on the trail?