Citrullus Lanatus Seed Oil

Citrullus Lanatus (watermelon) seed oil is a non-volatile emollient lipid typically used at a few percent up to higher levels in moisturizers and is generally well-tolerated, with low rates of irritant reactions in standard use. However, as a natural seed oil it can still trigger occasional irritation or allergy in highly reactive/eczema-prone individuals (often due to individual sensitization or oxidation byproducts), so it is not truly inert. For patient safety in severe sensitivity, I score it as very gentle but not zero-risk. Safety Notes: In commercial skincare, Citrullus Lanatus (watermelon) seed oil is often used at very low levels (~0.05–0.5%) as a label/marketing oil in emulsions (lotions, creams, serums) and in rinse-off cleansers where it primarily supports emolliency and claim aesthetics. It is also commonly formulated at ~1–10% in leave-on moisturizers, facial oils, and balms as part of an oil blend. The upper end reaches 100% in consumer-available single-ingredient carrier oils (pure watermelon seed oil) and near-neat anhydrous oil blends marketed as facial/body oils; no specific global cosmetic concentration cap applies beyond standard safety/quality and oxidation/stability considerations.