Nature Made Magnesium Glycinate 300 mg per 3 Capsules, 90 Capsules

Nature Made's 300 mg magnesium glycinate comes in a 90-capsule bottle that lasts 30 days. It costs about $23 and averages 4.7 stars from around 3,100 reviews. That's a smaller review count than the 60-capsule version, but a slightly higher average.

What's in it

The listing gives 300 mg of magnesium per serving of three capsules, taken daily with water and a meal. The magnesium is bisglycinate, a chelated form that Nature Made describes as gentle on the stomach. It's gluten-free, with no added color and no artificial flavors.

The listing says the product is United States Pharmacopeia (USP) Verified. That matters more than it might seem. Dietary supplements aren't approved by the FDA for safety or effectiveness before they're sold, so an independent check that the bottle contains what the label says is a useful quality signal. It doesn't mean the supplement works for sleep.

Does it help with sleep?

Maybe, for some people. The evidence for magnesium and sleep is limited and mixed. It may help if you're low in magnesium. If you're not, expect little. Our magnesium for sleep guide goes into the research, and how to stop racing thoughts at night covers non-supplement approaches to try.

The dose, and the limit

The NIH Office of Dietary Supplements sets the upper limit for supplemental magnesium at 350 mg a day for adults (food magnesium doesn't count). At 300 mg, this one gets close. Add a multivitamin or a sleep blend with magnesium in it and you could go over without noticing. Read the Supplement Facts panel on everything you take.

Check with your doctor or pharmacist before starting, especially if you have kidney disease or take medication.

Who it's for

• People who want a third-party verified magnesium
• Adults who aren't taking any other magnesium-containing supplements

Who should skip it

If you already take a multivitamin with magnesium, the Nature Made 200 mg, 60 capsules leaves more headroom under the 350 mg limit and costs about $12. It's two capsules a day instead of three, though its listing doesn't mention USP verification. The Doctor's Best 240-tablet bottle is the other common choice, with about 76,600 reviews.

Supplements sit at the edge of a good routine, not the center. Our bedtime routine for adults covers the rest.