What it is
This sulfite salt is used at low levels as an antioxidant and stabilizer that protects oxidation-prone ingredients (such as some vitamin C forms and self-tanning agents) and helps preserve color and potency.
Safety & warnings
Sulfites can trigger reactions in sulfite-sensitive individuals; it is used at low levels in cosmetics.
Origin & sourcing
Synthetic inorganic sulfite salt.
Questions everyone asks
What does sodium metabisulfite do?
It is an antioxidant that protects oxidation-prone ingredients and helps keep the formula stable.
Is it an allergen?
Sulfites can cause reactions in sulfite-sensitive people, though it is used at low levels.