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Sodium Lactate
Sodium LactateHydrator
Salt of lactic acid. Component of skin's natural moisturizing factor; humectant rather than exfoliant.
What it does
Sodium lactate is the salt form of lactic acid. Unlike lactic acid itself, sodium lactate is not acidic enough to exfoliate at typical concentrations — its job in formulations is humectant activity and pH buffering. Sodium lactate is one of the components of skin's natural moisturizing factor (NMF), so topical use is on-spec with how skin manages hydration on its own.
The evidence, graded
strongHydrating ingredients (hyaluronic acid, glycerin) show immediate plumping and dewy-finish effects within minutes. Barrier-repair products (ceramides, panthenol, niacinamide-as-barrier) show measurable improvement in 1–2 weeks.Pavicic 2011 · Journal of Drugs in Dermatology ↗
emergingNiacinamide reduces transepidermal water loss while hyaluronic acid adds hydration. They work well in the same routine and are commonly co-formulated.Bissett 2002 · Cutis ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
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