Botanical guide · Ingredient reference

How much KSM-66 ashwagandha has been studied?

KSM-66 is a named ashwagandha root extract, and its studied dose depends on the outcome. ODS describes sleep studies using KSM-66 amounts in the 250 to 600 milligram daily range. That range is research context, not a universal best dose or a guarantee of benefit.

Read the evidence ↓

Supplement Science Insights Editorial Team

Published September 23, 2026

Match the goal to the study

ODS summarizes trials of stress and sleep using different extracts and durations. Its sleep review includes KSM-66 root extract studies and a different root-and-leaf extract at a lower mass. Those numbers cannot be treated as interchangeable dosing instructions. [1]

A commonly studied amount is not an optimum

Some sleep benefits were more apparent around 600 milligrams daily and after several weeks, but study comparisons do not establish that everyone needs that amount. A study testing one regimen is not a direct comparison of all possible doses or personal risk profiles. [1]

Check the finished product

A gummy or capsule may provide only part of its stated daily serving in each unit and may include other ingredients. Confirm that the label actually identifies KSM-66, the amount per serving and the suggested serving frequency. A root-equivalent headline is a different quantity. [2][1]

Safety does not disappear with a branded extract

Imagine someone doubles a familiar extract because another person uses more. That is not evidence-based personalization. The usual pregnancy, thyroid, autoimmune, liver and medicine cautions still apply, and long-term safety remains insufficiently established. [3]

Hypothetical example — read a KSM-66 dose
TermMeaning
Milligrams of extractActual extract mass
Per gummy or per servingDifferent denominators
Studied daily amountSpecific trial context
Higher doseNot automatically greater benefit
How much KSM-66 ashwagandha has been studied? — original article outline diagram
Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

Sources for this article

  1. Ashwagandha: Is it helpful for stress, anxiety, or sleep? - Health Professional Fact Sheet
    Source consulted: 2026-09-21. This is a reference resource, not a claim that we conducted the studies or tested a product.
  2. Dietary Supplements: What You Need to Know
    Source consulted: 2026-09-21. This is a reference resource, not a claim that we conducted the studies or tested a product.
  3. Ashwagandha: Usefulness and Safety | NCCIH
    Source consulted: 2026-09-21. This is a reference resource, not a claim that we conducted the studies or tested a product.