Ashwagandha KSM-66
Also known as: Withania somnifera, Indian ginseng, winter cherry, KSM-66 ashwagandha, withanolides
Effective Dosage
300-600 mg daily (root extract, standardized to withanolides)
What the Science Says
Ashwagandha is an ancient medicinal herb from Ayurvedic tradition, and KSM-66 is a patented, concentrated root extract standardized to at least 5% withanolides — its active compounds. It works as an adaptogen, meaning it helps the body manage physiological stress responses, primarily by modulating cortisol levels and the HPA axis. General clinical literature suggests benefits for perceived stress, anxiety, sleep quality, and possibly testosterone and physical endurance at doses of 300–600 mg daily over 8–12 weeks, though no specific study data was available for this review.
What It Doesn't Do
Won't replace therapy or medication for clinical anxiety or depression. Not a proven muscle-builder on its own — any fitness benefits are modest at best. KSM-66 branding doesn't automatically mean a product is dosed correctly. Won't produce noticeable effects overnight — most reported benefits take weeks. Not a hormone replacement or testosterone booster in any meaningful clinical sense.
Absorption & Bioavailability
Moderate — fat-soluble withanolides absorb better when taken with food containing some fat. KSM-66's full-spectrum root extraction is designed to preserve the natural ratio of active compounds, which may improve consistency of absorption compared to generic extracts.
Red Flags to Watch For
- No study abstracts were provided for this review — all claims here draw on general knowledge, not verified papers
- KSM-66 is a trademarked ingredient; products may use the name while underdosing — always check the label for mg amount and withanolide percentage
- Rare reports of liver injury associated with ashwagandha supplements; consult a doctor if you have liver conditions
- May interact with thyroid medications, immunosuppressants, or sedatives — not safe to assume it's inert
- Pregnant or breastfeeding individuals should avoid — traditional use includes it as an abortifacient at high doses
Research Sources
- General knowledge
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06