My girlfriend's training for her second 100k and asked me to help her build a nootropics stack that's more endurance-focused. She's already using cordyceps, Rhodiola and L-theanine with a little caffeine from yerba mate. I suggested adding alpha GPC and beta alanine but she's unsure about anything that might mess with her stomach midrun. Anyone here use noopept or phenylpiracetam for long runs without crash or GI issues? She's also experimenting with microdosing but only on recovery days.