Rhodiola vs Caffeine

for energy / fatigue

Stronger evidence: Caffeine

Stronger effect: Caffeine

Safety: Rhodiola has the more serious interaction profile (uncertain vs minor).

For energy / fatigue, Caffeine has the stronger evidence grade.

grade C low certainty

small reductions in fatigue in stressed adults; studies are short and small

grade B moderate certainty

reduces perceived fatigue; tolerance develops with regular use

40–200 mg

sources: PMID:00000031 · PMID:00000021