Oryzanol

Oryzanol (gamma-oryzanol) is an antioxidant/emollient typically used at low levels (~0.1–1%) in moisturizers and sunscreens to support barrier function and reduce oxidative stress. It is generally well-tolerated in patch-test experience with a low rate of irritation/sensitization, but as a rice-derived ester mixture it can rarely trigger reactions in highly reactive or eczema-prone skin. Given the overall low irritancy at typical use concentrations while acknowledging non-zero risk, it fits "very gentle" rather than fully inert. Safety Notes: In commercial skincare, oryzanol (typically gamma-oryzanol from rice bran oil) is most often used as an antioxidant/skin-conditioning active at very low levels (~0.01–0.1%) in leave-on lotions, moisturizers, sunscreens/after-sun and anti-aging products where it supports oxidative stability and marketing claims. Mid-range use (~0.2–1%) appears in more “active” antioxidant serums and barrier products, while the upper end is seen in consumer-available anhydrous balms/oil concentrates and some high-load emulsions where solubility and sensorial constraints allow several percent. Above ~5% is uncommon in OTC products due to formulation limits (solubility/crystallization, feel) rather than specific regulatory caps, and rinse-off products typically sit toward the low end because of brief contact time.