Simmondsia Chinensis Seed Oil

Simmondsia Chinensis (jojoba) seed oil is primarily an emollient/wax ester used at moderate-to-high levels in moisturizers and is generally well tolerated, including in eczema-prone skin, with low rates of irritant reactions in clinical use. However, as a botanical lipid it is not completely inert—rare irritation or allergy can occur (especially with oxidized/impure oils or in highly compromised barriers)—so I do not score it as exceptionally gentle/inert. For patient safety in very reactive populations, a small but real irritation potential warrants a very gentle (0.2) score. Safety Notes: In commercial skincare, jojoba oil is frequently used at very low levels (~0.1–1%) as an emollient/skin-feel modifier in lotions, creams, cleansers, and shampoos, and at moderate levels (2–20%) in facial oils, body oils, balms, and barrier creams. The top of the observed consumer market includes 100% pure jojoba oil sold as a standalone leave-on oil, which is widely available OTC; rinse-off products typically sit at the low end due to cost, foaming/performance constraints, and wash-off.