Carthamus Tinctorius Seed Oil

Carthamus Tinctorius (safflower) seed oil is primarily an emollient used at moderate-to-high concentrations in leave-on products, and it is generally well tolerated with low irritancy in patch testing for most users. However, like many plant-derived oils it can rarely trigger irritation or contact allergy in highly reactive or eczema-prone patients (often influenced by oxidation/impurities), so it is not truly inert. Given typical real-world use and sensitive-skin safety considerations, it fits best as very gentle rather than exceptionally gentle. Safety Notes: In commercial leave-on skincare, safflower (Carthamus tinctorius) seed oil is frequently used at low levels (~0.1–2%) as an emollient/lipid-replenishing co-oil in creams, lotions, and serums, and in rinse-off cleansers it may appear at similar trace-to-low levels mainly for skin feel. At the high end, consumer-available facial/body oils and “100% safflower oil” single-ingredient products are sold at 95–100% (with 100% common when it is the sole INCI-listed ingredient), reflecting the full observed OTC market range.