If you're using magnesium to wind down, ease muscle tension, or support a steady heartbeat, the form here works in your favor. **Magnesium glycinate** is one of the best-absorbed, gentlest-on-the-stomach forms, and it's the type most associated with calm and sleep support.

Read the label closely: the '665 mg' on the front is the weight of the glycinate compound, not the magnesium your body actually absorbs. Each capsule delivers 120 mg of elemental magnesium — the number that matters — which sits just above the 100 mg therapeutic minimum.

To reach a meaningful daily intake, follow the directions and take all three capsules: that puts you at 360 mg of elemental magnesium, near the top of the 100–400 mg studied range. A single capsule gives you a modest 120 mg, so it's the three-times-daily schedule that makes this product deliver.

BioStacks
Nature's Truth

Magnesium Glycinate 665 mg

1 Capsule × 3/day · 60 servings

iHerbAmazon

Best for

Heart

Ingredients (1)

Magnesium

100%

Dose/day

360 mg

Target

100–400 mg

Form

Not listed

Other Ingredients (4)

Rice FlourFiller

Rice-based ingredients carry risk of inorganic arsenic contamination (FDA and Consumer Reports). Rice accumulates arsenic from soil at higher rates than other grains. Used as a cheap filler — adds nothing beneficial.

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

GelatinCapsule

Protein derived from collagen, used in traditional capsule shells

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

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