Lanolin vs Paraffinum Liquidum: which is worse?

What is Lanolin?

Lanolin is a waxy substance secreted by the sebaceous glands of wool-bearing animals (sheep). It is extracted from raw wool during washing and consists of complex mixtures of esters, diesters, and hydroxy esters of fatty acids and alcohols. It is highly occlusive and closely mimics human sebum.

What is Paraffinum Liquidum?

Paraffinum liquidum is the INCI name for mineral oil — a highly refined, colorless, odorless petroleum-derived hydrocarbon liquid. It has been a staple cosmetic emollient for over a century.

Documented risks

Lanolin: Lanolin is broadly safe for cosmetic use. It is FDA-approved as a skin protectant in OTC products. The primary concern is contact allergy: approximately 1–2% of the general population and up to 5–8% of eczema patients are sensitized to lanolin alcohols (the allergen fraction). Purified lanolin and lanolin alcohols in modern formulations have lower allergenicity than historical crude grades. Lanolin is not a carcinogen, hormone disruptor, or systemic toxin. It is not vegan.

Paraffinum Liquidum: Cosmetic-grade paraffinum liquidum (highly refined mineral oil) is considered safe by the CIR and FDA. The EU restricts use based on refining grade, specifically prohibiting inadequately refined mineral oils that may contain carcinogenic PAH compounds. Highly refined grades (used in cosmetics globally) have no identified carcinogenic risk. Mineral oil does not penetrate intact skin and is not absorbed systemically. It is non-comedogenic at low concentrations; higher concentrations may contribute to congestion in acne-prone skin. Inhalation of mineral oil mist in occupational settings is a separate concern not applicable to cosmetic topical use.