Magnesium Aspartate
INCI: Magnesium Sulfate
Reviewed by Rosie · Last updated 18 Aug 2026
Also known as: Magnesium Sulfate
A magnesium salt of amino acid aspartic acid
EWG Safety Score
What Is Magnesium Aspartate?
The magnesium salt of aspartic acid, an acidic amino acid that plays a role in maintaining proteins in skin. In cosmetics, magnesium aspartate acts as hydrating and softening ingredient. Magnesium aspartate is considered safe as used in cosmetics, is non-irritating and bioavailable to skin. Usage levels typically go between 0.5–1%, but lower amounts may be used when the ingredient is part of a blend with other amino acids and glucose-derived ingredients known as gluconates.
Clinical Evidence & References
Published Research
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Nutrients, September 2015, pages 8,199-8,226 Nutrients, 2015
From the Clinic
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Take the skin quizOther forms of Magnesium Aspartate
These appear on ingredients lists under different names but are the same substance. Magnesium Aspartate is the common form.
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