Sleep

What I tell patients about melatonin

It is a timing signal, not a sedative — and more is rarely better. How I think about sleep support.

By Dr. Elizabeth Isalguez, MD

August 12, 2026 · 1 min read

Moonlight filtering through sheer linen curtains at a bedroom window at night

Melatonin is the most misunderstood bottle in the pharmacy aisle. It is a timing signal, not a sedative — useful in specific situations, but megadoses often trade tomorrow's grogginess for tonight's sleep.

Timing signal, not off switch

Your body makes melatonin on a schedule anchored by light. Blasting that system nightly with many times the physiologic dose can leave you groggy without teaching the underlying rhythm anything.

What I reach for instead

For most patients I prefer supporting the wind-down itself: magnesium and glycine at clinically meaningful doses, alongside boring, consistent light habits.*

Good sleep is built at 8am with morning light, not at midnight with a capsule.

Common questions

Short answers to what patients ask most often.

Is melatonin a sleeping pill?

No. It is a timing signal that tells the body when night is, rather than a sedative. That distinction changes when and how it is useful.

Is a higher dose of melatonin better?

Rarely. Doses many times higher than what the body produces often leave you groggy the next day without teaching the underlying rhythm anything.

What supports sleep instead of high-dose melatonin?

Supporting the wind-down itself with magnesium and glycine at clinically meaningful doses, alongside consistent light habits and especially morning light. These statements have not been evaluated by the Food and Drug Administration.

What I reach for on sleep

Physician-selected, GMP-made in the USA, clinically meaningful doses.

Magnesium Glycinate

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This article is educational and is not medical advice. *These statements have not been evaluated by the Food and Drug Administration. Consult your physician before starting any supplement.

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