Skip to content
HealthWorld

The Best Magnesium Supplements on Amazon

Updated By the HealthWorld editorial teamHow we pick

We may earn a commission when you buy through our links, at no extra cost to you. Affiliate disclosure

As an Amazon Associate I earn from qualifying purchases.

Top picks at a glance

  1. 1
    Pure Encapsulations Magnesium (Glycinate)

    Best overall

    Pure Encapsulations Magnesium (Glycinate)

    Magnesium 120 mg · Form Glycinate

  2. 2
    Nature Made High Absorption Magnesium Glycinate

    Best drugstore brand

    Nature Made High Absorption Magnesium Glycinate

    Magnesium 200 mg · Form Bisglycinate

  3. 3
    Doctor's Best High Absorption Magnesium

    Best fully chelated tablet

    Doctor's Best High Absorption Magnesium

    Form Glycinate · Chelated 100%

See all 4 picks and why ↓

Glycinate is the form behind Amazon's top-selling magnesium. When we checked on October 31, 2026, Pure Encapsulations Magnesium (Glycinate) was #1 in all of Amazon's vitamins and supplements, and Nature Made's glycinate was in the top 5 of minerals. We compared them with Doctor's Best and Thorne by magnesium per serving, form and format.

Our picks

  1. Pure Encapsulations Magnesium (Glycinate)

    #1Best overall

    Pure Encapsulations Magnesium (Glycinate)

    120 mg of magnesium as glycinate per capsule, with a short hypoallergenic label that's gluten-free and non-GMO. One capsule per serving makes the dose easy to adjust.

    Magnesium 120 mgForm GlycinateeBay Full facts →
  2. Nature Made High Absorption Magnesium Glycinate

    #2Best drugstore brand

    Nature Made High Absorption Magnesium Glycinate

    200 mg of chelated magnesium bisglycinate per 2-capsule serving, labeled gentle on the stomach, from a trusted drugstore brand. In Amazon's minerals top 5 when we checked.

    Magnesium 200 mgForm BisglycinateeBay Full facts →
  3. Doctor's Best High Absorption Magnesium

    #3Best fully chelated tablet

    Doctor's Best High Absorption Magnesium

    100% chelated magnesium (glycinate lysinate) in tablet form, gentle on the stomach and one of the most popular glycinate products available.

    Form GlycinateChelated 100%eBay Full facts →
  4. Thorne Magnesium Bisglycinate

    #4Best powder

    Thorne Magnesium Bisglycinate

    Magnesium bisglycinate powder you stir into water in the evening, from one of the most trusted practitioner brands. On Amazon, make sure you select the powder rather than a capsule version.

    Form BisglycinateFormat PowdereBay Full facts →
Amazon's live top 100 in Sleep

What to look for

Magnesium per serving
Labels list the magnesium itself, not the weight of the whole glycinate compound. Pure Encapsulations gives 120 mg in one capsule and Nature Made 200 mg in two, so compare per serving and per capsule.
The form on the label
Glycinate (or bisglycinate) is gentle on the stomach. Oxide is cheaper but less well absorbed, and citrate can loosen stools. Multi-form blends make it harder to see how much of each form you get.
Who's selling it
Check the 'Ships from' and 'Sold by' lines and buy from Amazon or the brand. When the bottle arrives, look for an intact seal, a lot number and a best-by date.
Certifications over stars
Star ratings mostly reflect people's experience and delivery. For an independent check of what's in the bottle, look for marks like USP Verified or NSF on the current label.
Kidneys and medication
Ask your doctor before taking magnesium if you have kidney disease or take regular medication; magnesium can affect how some antibiotics and other medicines are absorbed. For adults, the upper limit from supplements is 350 mg a day unless your doctor advises otherwise.

Frequently asked questions

What is the best-selling magnesium on Amazon?

When we checked Amazon.com on October 31, 2026, Pure Encapsulations Magnesium (Glycinate) was #1 in minerals and in all of vitamins and supplements, and Nature Made Magnesium Glycinate was in the minerals top 5. Rankings change often, so the order may be different when you look.

Pure Encapsulations vs Nature Made magnesium: what's the difference?

Both use glycinate. Pure Encapsulations is 120 mg in one capsule with a hypoallergenic, gluten-free, non-GMO label; Nature Made is 200 mg of chelated bisglycinate in two capsules, labeled gentle on the stomach. Choose by the dose you want and how many capsules you're happy to take.

Which magnesium on Amazon is best for women?

The same glycinate products suit women and men. Adult women need 310–320 mg of magnesium a day from all sources, including food, and the upper limit from supplements is 350 mg. One Pure Encapsulations capsule (120 mg) or a Nature Made serving (200 mg) fits within that. If you're pregnant, ask your doctor first.

Does magnesium glycinate help with sleep?

Magnesium supports muscle relaxation and normal nervous system function, which is why many people take glycinate in the evening. It isn't a sleeping pill, and research on sleep itself is limited. If poor sleep persists, talk to your doctor.

Who shouldn't take magnesium supplements?

People with kidney disease should take magnesium only under a doctor's care, because the kidneys clear the excess. If you take antibiotics, osteoporosis drugs or other regular medication, ask your pharmacist about timing. Too much magnesium can cause diarrhea.

Sources