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KSM-66® is a root only ashwagandha extract, made exclusively from the root (not the leaf), using a patented, solvent free extraction process that preserves the full spectrum of active withanolides. Ashwagandha products vary widely in extract type, plant part and standardization. KSM-66® is a named, traceable extract standardized to 5% withanolides, rather than an unnamed powder with no stated withanolide content.

Ashwagandha is an adaptogen, a class of herbs traditionally used to help the body adapt to everyday stress. KSM-66® supports a healthy stress response so you can wind down naturally.† It is not a sedative and not a stimulant, and it doesn't mask how you feel.

Yes. KSM-66® at a 600mg daily serving is well tolerated and is commonly taken daily over long periods. The most common side effect in a small number of people is mild gastrointestinal sensitivity, taking it with food resolves this in almost all cases. If you are pregnant, nursing, or taking prescription medication (particularly immunosuppressants or thyroid medication), consult your physician before starting.

Ashwagandha products vary widely in extract type, serving size, plant part and standardization. Three things define Optibio. First, we use KSM-66®, a patented root only ashwagandha extract, rather than an unnamed powder. Second, we use a full 600mg daily serving. Third, it is third party tested for purity and potency, and manufactured in a USA GMP certified facility. We don't cut corners on the ingredient, the dose, or the manufacturing standard. See how specific named brands compare in our buyer's guide.

Ashwagandha is an adaptogen that works gradually with consistent daily use rather than like a stimulant. This is why we recommend starting with a subscription, it gives you enough time to experience the full benefit and make a fair assessment. The 90 day money back guarantee exists precisely because we know results take time and we want you to have the full window to judge. Read the full timeline guide.

You get a full refund, no questions, no forms, no hassle. Email us at support@optibiosupplements.com within 90 days of your purchase and we will refund your entire order. We take on the risk so you don't have to. We're confident in the science behind KSM-66® and in our product, but we also know that no supplement works identically for every person, and we believe you should be able to try it without financial risk.