D DosePrice
Form comparison

Magnesium forms compared

Factual, non-medical comparison of common magnesium supplement forms. Each form has a different elemental magnesium fraction: the percentage of actual magnesium your body can absorb from the compound. Prices below are ranked by EUR per 100mg elemental, which accounts for these differences automatically.

What you should know about magnesium forms

Magnesium is always sold as a compound (bound to another molecule), never as pure elemental metal. The fraction of elemental magnesium in each compound varies:

Form Compound Elemental Mg fraction Typical use
Oxide MgO ~60% Highest weight fraction; often cheapest per gram of elemental but may have lower bioavailability.
Citrate Mg(C₆H₆O₇) ~16% Common, decent solubility. Mid-range price per effective dose.
Bisglycinate Mg(C₂H₄NO₂)₂ ~18% Amino acid chelate. Often positioned as a premium form.
Glycinate Mg(C₂H₄NO₂)₂ ~14% Similar to bisglycinate. Lower elemental fraction.
Malate Mg(C₄H₄O₅) ~15% Malic acid salt. Mid-range fraction.

DosePrice does not provide medical advice. The rankings reflect price per effective dose only. Which form is right for you depends on your individual needs and should be discussed with a healthcare professional.

Magnesium Citrate (2 products)

Best value: EUR 0.1998 per 100mg elemental

Magnesium Oxide (1 product)

Best value: EUR 0.3300 per 100mg elemental

Magnesium Bisglycinate (1 product)

Best value: EUR 0.3332 per 100mg elemental

Affiliate disclosure

Some retailer links may be affiliate links. That can earn DosePrice a commission, but rankings stay based on normalized EUR per effective dose, availability, and data quality.

Read the full disclosure