Hydrogenated Soybean Oil

Hydrogenated soybean oil is a saturated emollient/occlusive used in moisturizers and balms (often a few percent up to higher levels in ointment-like formulas) and is generally well-tolerated with low inherent irritancy. However, soybean-derived materials can rarely trigger allergic contact dermatitis in sensitized individuals, and occlusive oils can occasionally worsen folliculitis/acne in reactive skin, so it is not truly inert. For compromised or highly eczema-prone patients, I rate it as very gentle but not zero-risk. Safety Notes: In commercial skincare, hydrogenated soybean oil is often used at very low levels (~0.05–1%) as a structuring agent/opacifier or co-emollient in lotions, cleansers, and emulsions (leave-on and rinse-off). At the high end, it can function as a primary base/structurant in anhydrous products (lip balms, body butters, cleansing balms, solid sticks) where it can comprise the bulk of the formula, commonly 10–60% and in some minimalist/balm systems reaching ~80–90%. There is no specific EU/FDA concentration cap for this ingredient in cosmetics; practical limits are instead driven by texture, melting point, and compatibility with other waxes/oils.