Researched by Helena DeMaria-Williams
Formula IngredientHumectantSodium Lactate
INCI: Sodium Lactate
Sodium lactate is the sodium salt of lactic acid, a naturally occurring component of the skin's Natural Moisturising Factor (NMF). It is a powerful humectant that attracts and retains moisture in the skin — reported to improve skin moisture content by up to 84%, making it a far stronger humectant than glycerin and capable of storing over twice as much water. It also functions as a pH buffer and has mild keratolytic properties.
Category
Humectant
Irritation Risk
Low
Skin Types
all skin types, dry, dehydrated, oily, combination, sensitive, acne-prone
What does this do in a formula?
intense hydration, moisturisation, pH regulation, mild exfoliation, improved skin moisture content, part of skin's natural NMF
Is Sodium Lactate safe? Key considerations
Can Sodium Lactate cause irritation?
Low RiskSodium lactate is a skin-identical ingredient present in the skin's own NMF. It is well tolerated at typical cosmetic concentrations (0.5–4%). Approved by Ecocert and COSMOS as a natural ingredient. No EU CosIng Annex II or III restrictions apply.
Does Sodium Lactate increase sun sensitivity?
No RiskSodium lactate does not increase photosensitivity. While it is the sodium salt of lactic acid (an AHA), its keratolytic activity at typical cosmetic concentrations is mild and does not warrant specific sun protection beyond standard daily SPF use.
Is Sodium Lactate safe during pregnancy?
SafeSodium lactate is a naturally occurring component of the skin's NMF and is widely considered safe during pregnancy. No reproductive or developmental toxicity concerns are documented. It is also used as a food additive (E325), indicating a well-established safety profile.
How does Sodium Lactate work?
Sodium lactate is the sodium salt of lactic acid, a naturally occurring component of the skin's Natural Moisturising Factor (NMF). It is a powerful humectant that attracts and retains moisture in the skin — reported to improve skin moisture content by up to 84%, making it a far stronger humectant than glycerin and capable of storing over twice as much water. It also functions as a pH buffer and has mild keratolytic properties.
