Feb 18, 2026Eleuthero (Siberian Ginseng): Adaptogen Evidence, Fatigue, and Comparison with RhodiolaEleuthero (Eleutherococcus senticosus) is one of the most studied adaptogens, with Soviet-era and modern research on fatigue, immune function, and physical performance. Evidence quality is moderate; its benefit profile overlaps with rhodiola but with a distinct safety profile.
Jan 12, 2026Rhodiola Rosea for Fatigue: SHR-5 Extract, RSSM Trials, and Adaptogen EvidenceRhodiola rosea (SHR-5 extract) has the most consistent human evidence of any adaptogen for reducing fatigue and improving stress tolerance. Effect sizes are modest but reproducible across multiple RCTs.
Jan 9, 2026Ashwagandha for Stress and Cortisol: KSM-66, Sensoril, and RCT OutcomesAshwagandha (KSM-66 and Sensoril extracts) reduces serum cortisol and perceived stress scores in multiple RCTs. Effect sizes are moderate and consistent across trials, though study durations are short.