Nature's Bounty Magnesium Glycinate Review

This is educational information, not medical advice. Melatonin can interact with blood thinners, immunosuppressants, and some diabetes medications; most doctors recommend avoiding it during pregnancy and breastfeeding; and it may worsen mood in people with mood disorders. If you take prescription medication, are pregnant or breastfeeding, or have a mood disorder, talk to a doctor before trying any supplement on this page. See our full melatonin guide for dosing and safety details.

The short version

The highest-rated, most-reviewed product in this entire roundup — over 81,000 ratings at 4.8 stars — and it’s not melatonin at all. Our own melatonin alternatives guide and magnesium vs. melatonin comparison both point to magnesium glycinate specifically as a non-hormonal relaxation option worth considering before or alongside melatonin.

What it actually is

Per the manufacturer’s listing:

240mg magnesium glycinate per 2-capsule serving — a form chosen specifically for absorption
Marketed for muscle relaxation, bone, heart, and nerve health — general wellness framing, not a sleep-specific product
Non-GMO, gluten-free, lactose-free, vegetarian

Why this is on a sleep supplement list

Magnesium doesn’t work the same way melatonin does — it’s not a circadian signal, it’s a mineral involved in nervous system regulation, and some people find adequate magnesium intake supports relaxation and easier sleep onset. It doesn’t carry melatonin’s hormone-related cautions (pregnancy, mood disorders), though it has its own interactions (certain antibiotics, and high doses can cause digestive upset) — check with a doctor if you take other medications.

Who it’s a good fit for

Anyone who wants to try a non-hormonal option instead of, or alongside, melatonin — or who’s read our guide’s caution that melatonin “won’t fix” insomnia driven by anxiety or poor sleep habits and wants a different angle to try.

Where it’s probably not the right pick

If you specifically want the circadian-signaling effect of melatonin (for jet lag or shift work, where it has its strongest evidence), magnesium doesn’t do that job — see our melatonin picks for that specific use case instead.

Bottom line

The best-reviewed product on this entire list, and a genuinely different mechanism worth trying if melatonin hasn’t worked for you.

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