What it is
Disodium Guanylate is the sodium salt of guanosine monophosphate, a nucleotide best known as a savory flavor enhancer in food. In cosmetics it is used at low levels as a skin-conditioning ingredient, often paired with related nucleotide salts. In a sunscreen it acts as a minor supporting additive rather than a primary functional component.
Safety & warnings
Nucleotide salts are generally well tolerated in skin care at the low levels used. They are water soluble and not associated with comedogenicity.
Origin & sourcing
Typically produced by fermentation or enzymatic processing of nucleotide sources, then converted to the disodium salt.
Questions everyone asks
What is Disodium Guanylate doing in a sunscreen?
It is included at low levels as a skin-conditioning additive, often alongside related nucleotide salts.
Isn't this a food ingredient?
Yes, it is also used as a flavor enhancer in food, but in cosmetics it serves a conditioning role.