Magnesium Glycinate vs. Bisglycinate: Which Form Absorbs Better?
Magnesium glycinate and magnesium bisglycinate are the same compound—magnesium bound to two glycine molecules—just named differently by suppliers.
Shoppers see two labels and assume potency or quality differs, leading to Reddit debates and pharmacy confusion when the only real variable is capsule size or filler.
Key Differences
None chemically. “Glycinate” is USP nomenclature; “bisglycinate” is European. Absorption hinges on chelation quality and stomach acid, not the label.
Which One Should You Choose?
Pick the brand that lists elemental magnesium per capsule and third-party testing. Price and pill count usually matter more than the suffix.
Can I take both forms together?
Yes, but you’ll just be doubling the same chelate—stick to one to avoid excess glycine.
Does one absorb faster on an empty stomach?
Both absorb well with or without food; glycine actually buffers stomach acid.