Potassium Lactate
Reviewed by Daisy · Last updated 18 Aug 2026
Also known as: Lactic Acid, Natural Moisturizing Factor (NMF)
Potassium salt of lactic acid | Improves skin’s natural moisturising factor
Addresses
EWG Safety Score
What Is Potassium Lactate?
Potassium lactate is the potassium salt of lactic acid. It is mostly used as a preservative and color stabilizer in meat products to extend their shelf life because of its ability to fight bacteria that would otherwise lead to food spoilage. Usage levels of potassium lactate for this purpose range from 1–4.8%.
In skin care, research has shown that potassium lactate can improve skin’s natural moisturizing factor (NMF) by increasing surface hydration.
Clinical Evidence & References
Published Research
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Experimental Dermatology, October 2011, pages 826–831 [https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1600-0625.2011.01336.x]
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Lactic Acid, Sodium Lactate, and Potassium Lactate, Technical Report, February 17, 2015 [https://www.ams.usda.gov/sites/default/files/media/Lactic%20Acid%20TR%202015.pdf]
From the Clinic
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Polygonum Hydropiper Extract
Plant extract with antioxidant properties used primarily as a humectant
Polylactic Acid
Biodegradable polymer for gentle physical exfoliation
Polypodium Vulgare Rhizome Extract
A fern extract traditionally used to support skin hydration and conditioning
Potassium PCA
Potassium PCA is the potassium salt of PCA (pyrrolidone
Potentilla Anemonifolia Extract
A plant extract that helps skin retain moisture and maintain a smooth appearance
PPG-2 Arginine
A humectant and skin conditioner derived from amino acids and propylene glycol
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