What To Look For In A Magnesium Supplement + Our 16 Top Picks

First and foremost, if you’re taking a magnesium supplement regularly, you’ll want to make sure it’s gentle on the stomach. Generally, the higher the bioavailability, the better for daily use. Finding a supplement that is enjoyable to take and comes in a format that you can easily work into your routine—be it a capsule, tablet, powder, or liquid—is also important.

Some magnesium supplements need to be taken with food, which is another thing to be aware of. Depending on the serving size, you may also end up needing to take three or four capsules daily.

You’ll notice that the price point of magnesium supplements varies widely. While basic (stand-alone) magnesium supplements are relatively affordable, pricier ones will contain other nutrients or botanicals for a more well-rounded blend. Any premium supplement should feature high-quality, clean ingredients and ideally be free of GMOs, gluten, dairy, soy, and major food allergens.

Purity is also a sign of quality, so look for a supplement that is free of binders, preservatives, and artificial colors or flavors.

Finally, unless otherwise specified by your doctor, you’ll want to look for a supplement that falls near or below the tolerable upper intake level for supplemental magnesium, 350 mg, to minimize the potential for unwanted side effects that may occur in some individuals at higher levels.

The following supplements are the cream of the magnesium crop: They deliver science-backed doses of magnesium in convenient forms, without unnecessary fillers or additives. Some also contain other active ingredients for added benefits like deeper sleep, sharper focus, and healthier bones.*