Clinically studied ashwagandha, done properly.

KSM-66® is a root only ashwagandha extract, made only from the root, never the leaf, using a proprietary extraction process with no alcohol or chemical solvents. It is standardized to 5% withanolides, so it is a named, traceable extract rather than an unnamed powder.

For KSM-66 Ashwagandha, take 1 capsule twice daily, or 2 capsules once daily with a glass of water. You can take it with or without food. The serving and suggested use for each formula are printed on its label and product page.

Ashwagandha is not a stimulant. It is meant to be taken every day, consistently. Individual experiences vary. The 90 day guarantee gives you the full window to decide. Read the full timeline guide.

KSM-66® at a 600 mg daily serving is generally well tolerated with consistent daily use. A small number of people notice mild stomach sensitivity, and taking it with food helps. If you are pregnant, nursing, taking prescription medication, or have a medical condition, talk to your physician before starting.

Email us at support@optibiosupplements.com within 90 days of delivery and we will refund your order. No forms, and you keep the bottle. On a subscription the refund applies to your most recent shipment.

You get a new bottle every 45 days at the subscription price. KSM-66 Ashwagandha subscriptions ship free. Your plan renews automatically every 45 days until you cancel. You can skip a delivery or cancel anytime from your account.