BHT (Butylated Hydroxytoluene) is an antioxidant that prevents fatty compounds
in a formula from becoming rancid.
Based on the studies available, the CIR (Cosmetic Ingredient Review) expert panel
concluded that BHT does not cause significant irritation, sensitisation or
photosensitisation.
In addition, since the concentration of this ingredient is very weak in cosmetic formulations (from
0.0002% to 0.5%), its use does not present any risk.