Sodium Hexametaphosphate needs consideration within its finished formulation. The updated cosmetic assessment requires a product that does not irritate; earlier findings show why concentration and dilution matter.

The checked polyphosphate review reported different irritation responses at different concentrations and distinguished diluted-use products from leave-on exposure. It did not establish a treatment effect for seb derm or an exact-material Malassezia response. Consider the product’s intended use and personal comfort, and ask for advice about persistent irritation.