Does Ashwagandha KSM-66 interact with Melatonin?

Written to our editorial standards · reviewed against published research· Updated 2 Jun 2026
Take together· moderate evidence

Both support sleep, different ways.

The two help sleep in different ways: ashwagandha lowers cortisol and the stress that keeps you wired, building its effect over weeks, while melatonin is a timing signal that tells your body it is night and shortens how long it takes to fall asleep.

What to do

A reasonable evening pairing for stress-related poor sleep. Start melatonin low, around 0.5 to 1 mg, since more is not better and can leave you groggy, and take ashwagandha daily with food. See a clinician for ongoing insomnia.

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Ashwagandha KSM-66
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Melatonin
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Common questions

Can I take Ashwagandha KSM-66 and Melatonin together?
Take together. A reasonable evening pairing for stress-related poor sleep. Start melatonin low, around 0.5 to 1 mg, since more is not better and can leave you groggy, and take ashwagandha daily with food. See a clinician for ongoing insomnia.
Why do Ashwagandha KSM-66 and Melatonin interact?
The two help sleep in different ways: ashwagandha lowers cortisol and the stress that keeps you wired, building its effect over weeks, while melatonin is a timing signal that tells your body it is night and shortens how long it takes to fall asleep.

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Educational use only, not medical advice. Interaction risk depends on dose, your health, and any medications. Always consult a qualified clinician, especially if you take prescription drugs or are pregnant or nursing.