Evidence comparison

Ashwagandha (KSM-66) vs Rhodiola

How they actually compare on the evidence — trial volume, literature, mechanism, and our honest confidence grade. Higher counts reflect research attention, not proof of superiority.

Eastern · Adaptogen Herb

Ashwagandha (KSM-66)

印度人参

82Confidence

Human RCT evidence

RCTs: 57
Meta: 45
Trials: 72

Key active: Withanolides (botanical extract — KSM-66 / Sensoril standardized)

Multiple high-quality RCTs (stress, hormones, cognition, muscle); strong evidence base

KSM-66 and Sensoril extracts show consistent HPA-axis regulation in human RCTs: reduced cortisol, improved testosterone, muscle strength, and cognitive performance. Animal studies show healthspan extension and Nrf2/FOXO pathway activation. The withanolide withanone inhibits CDK4/6 and may suppress cellular senescence.

Full Ashwagandha (KSM-66) evidence →

Both · Adaptogen

Rhodiola

红景天

74Confidence

Human RCT evidence

RCTs: 61
Meta: 29
Trials: 38

Key active: Rosavins & salidroside (botanical extract)

Multiple human fatigue/stress RCTs; aging link mechanistic

Salidroside and rosavins are studied for stress-axis modulation and cellular stress resistance; human RCTs report reduced fatigue and improved stress tolerance.

Full Rhodiola evidence →

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Informational only — not medical advice or a recommendation to take either. Trial and literature counts are registry/database matches and include endpoints beyond longevity. See each ingredient page for sources.