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Sports Research KSM-66 Ashwagandha 300 mg Capsules bottle
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Sports Research KSM-66 Ashwagandha 300 mg Capsules Review

KSM-66 Ashwagandha is a branded, full-spectrum extract of Ashwagandha root, designed to support stress relief, mood, and cognitive function. It is often taken as a daily supplement to help the body adapt to physical and mental stressors.

Product Focus: Adrenal SupportAlso graded for:Stress and CalmEnergyLibido for MenMuscle and StrengthAlso covers:HormonesBrain
Tier ⓘ
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Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
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How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
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Biohacker Mentions
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Cost per month
$7
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Study, Trial or Testing Result Summary

MembersHuman studies

This product gives 600 milligrams of ashwagandha root extract a day, the 125 milligrams that stress in 8 to 12 week trials. A 2026 review pooling 23 placebo-controlled trials with 1706 adults found ashwagandha the stress hormone cortisol compared with placebo. …

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Review Totals and Summary

Members1,666 reviews
1,666 reviews · Amazon 1,376 · Transparentlabs 95 · Nootropicsdepot 77 · Naturesbounty 46 · Nowfoods 38 · Marianos 30 · Florahealth 4

Across various online platforms, KSM-66 Ashwagandha 300 mg Capsules have attracted a broad base of reviewers, the of whom report experiences. users describe the supplements as noticeably effective for managing daily stress and their overall sense of -being. …

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Biohacker Summary

MembersWhat our biohacker panel says

of the panel is on ashwagandha: four it, one uses it, and the rest are . People mainly take it to stress and cortisol, to sleep , and in a cases to support testosterone. …

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RAL Summary

MembersThe tier and why

Ashwagandha is given at a dose, and placebo-controlled trials and pooled reviews show it cortisol and stress. Reviews from buyers and the biohacker panel are .

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Endocrine system, Nervous system. Combine with and possible side are for members.

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Supplement Facts

KSM-66® Ashwagandha Extract 600 mg
Supplement Facts
Serving Size 1 Capsule
Servings Per Container 60
Amount Per Serving% Daily Value
KSM-66® Ashwagandha Extract (Withania somnifera) (root) (min. 5% total withanolides)600 mg†
† Daily Value not established.

Other ingredients: Rice Flour, Hypromellose (HPMC) Capsule, Vegetable Magnesium Stearate, Silica.

Directions: Typically 1-2 capsules (300-600 mg) per day.

Label source: Transparentlabs · Report a label change

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Our articles on this subject

Graded October 23, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.