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Magtein Magnesium L-Threonate

3 Capsules · 45 servings · $0.84/serving

iHerbAmazon

Best for

Heart

Ingredients (2)

Magnesium L-Threonate

100%

Dose

2000 mg

Target

100–400 mg

Form

Premium

Magnesium

100%

Dose

144 mg

Target

100–400 mg

Form

Not listed

Other Ingredients (2)

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.

HypromelloseCapsule

Plant-derived capsule material from cellulose

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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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