Ashwagandha Benefits: What the Science Actually Shows

Ashwagandha (Withania somnifera) is one of the most-researched adaptogens. Here is what clinical evidence actually supports.

Benefit 1: Cortisol Reduction (Strong Evidence)

Chandrasekhar et al. 2012 (IJAM): KSM-66 extract at 300mg twice daily reduced serum cortisol by 27.9% over 60 days in chronically stressed adults.

Benefit 2: Sleep Quality (Strong Evidence)

Langade et al. 2019 (PLOS ONE): 600mg KSM-66 daily improved sleep quality, onset latency, and morning freshness in adults with insomnia. Mechanism: GABA-A receptor activity producing a calming effect.

Benefit 3: Stress and Anxiety (Strong Evidence)

Multiple RCTs using validated scales (PSS, GAD-7) show significant reductions in perceived stress and anxiety. Pratte et al. 2014: consistent anxiolytic effects across studies.

Benefit 4: Testosterone and Performance (Moderate Evidence)

Wankhede et al. 2015 (J Int Soc Sports Nutr): men taking 300mg KSM-66 twice daily during 8 weeks of resistance training showed testosterone increases of 96 ng/dL vs 18 ng/dL placebo. This appears mediated primarily through cortisol reduction.

What Does NOT Have Strong Evidence

• Cognitive enhancement (inconsistent results)
• Weight loss (no direct evidence)
• Anti-aging effects (too early)

KSM-66 vs Sensoril vs Generic

The Protocol

300-600mg KSM-66 taken 30-60 minutes before bed. Can also be split morning/night at 300mg x 2.

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