Supplement Label Index

Magnesium Glycinate vs. Magnesium Amino Acid Chelate

Among 6,062 on-market magnesium products with an identifiable primary form, 9.5% use Magnesium Glycinate (573 products) and 4.6% use Magnesium Amino Acid Chelate (279).

Magnesium GlycinateMagnesium Amino Acid Chelate
Quality tierTier 1Tier 2
Magnesium by weight14.1%
Share of market9.5%4.6%
On-market products573279
Median declared dose100 elemental mg
middle half: 28.2–185
83 elemental mg
middle half: 25–175
Most common brandsMetagenics, Metabolic Maintenance, KALNaturesPlus, Douglas Laboratories, MH Michael's Health Naturopathic Programs

Doses are declared per serving in elemental mg. “By weight” is the share of the ingredient that is the nutrient itself (e.g. elemental magnesium in a magnesium salt).

Why Magnesium Glycinate is tier 1

Marketed and studied as a gentler, well-absorbed chelate; showed greater clinical symptom improvement than oxide in a comparative RCT.

Source: Walker AF et al. 2003, PMID 14596323

Why Magnesium Amino Acid Chelate is tier 2

Lower urinary/salivary Mg response than citrate in one RCT, though "amino acid chelate" is not a single defined compound.

Source: Walker AF et al. 2003, PMID 14596323

Tiers summarize published comparative bioavailability or outcome evidence for each form (see methodology). This page describes the market; it is not a recommendation to take either form. Talk to a clinician about what's right for you.

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