The chemistry of our nails: Lanolin

Lanolin is extracted from sheep’s wool grease (the sebaceous secretions of sheep), and is composed of 138 saturated and 32 unsaturated fatty acids with wonderful sterols like cholesterol, lanesterol, and agnesterol, which we know offer great moisturizing and anti-inflammatory properties, and cetyl and stearyl alcohols, which are great emollients and thickeners. (The cholesterol is of…

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