HINT: It’s more hydrating than glycerin and thus why it can plump up the skin😳
Lactobionic acid has a larger molecular size and weight comparing to glycolic acid (358.3 g/mol vs. 76.05 g/mol). Lactobionic acid's potential for increased hydration is attributed to humectant properties of the multiple hydroxyl groups (-OH), which can attract and hydrogen bond water.
With an additional sugar molecule attached, lactobionic acid is even more hydrating and gentle than another common form of PHA - gluconolactone. In a study comparing lactobionic acid to other acids and common humectants, lactobionic acid shows better humectant properties than glycerine and doubles that of gluconolactone.
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