Hydrogenated Olive Oil Unsaponifiables

Hydrogenated olive oil unsaponifiables are lipid-rich emollient fractions (e.g., squalene/sterols/tocopherols) typically used at low-to-moderate levels to support barrier function and reduce transepidermal water loss. Clinical experience and patch-test data for similar olive-derived unsaponifiable fractions show a low rate of irritant reactions, but rare sensitivity (including in highly reactive eczema skin) can occur due to botanical-origin variability and co-extracted minor components. Given its generally good tolerability yet non-zero risk in compromised barriers, it fits a very gentle score rather than inert. Safety Notes: In commercial skincare, hydrogenated olive oil unsaponifiables are most often used as a minor emollient/barrier-support lipid at very low levels (~0.05–0.5%) in lotions, serums, and cleansers where it supports skin feel and stability without greasiness. Mid-range use (~1–5%) is common in richer leave-on creams and balms, often as part of an “unsaponifiables/phytosterols” lipid complex. High-strength consumer products (overnight balms, barrier creams, and lipid concentrates) can reach about 8–10% before texture/waxiness and solubility constraints typically limit further increases; rinse-off products generally sit at the low end due to deposition and cost considerations.