Octacosanol, also known as 1-octacosanol, is a long-chain primary fatty alcohol consisting of 28 carbon atoms. It occurs naturally in plant waxes, particularly in wheat germ oil, rice bran, and sugarcane, and is a key component of policosanol mixtures. This waxy, white solid is chemically stable under normal conditions and exhibits lipophilic properties. It is commonly used in dietary supplements marketed for potential cholesterol-lowering effects, improved exercise performance, and neuroprotective benefits, though clinical evidence varies. Octacosanol is biosynthesized in plants via fatty acid elongation pathways and serves as a structural component in cuticular waxes. Its high molecular weight and hydrophobic nature make it poorly absorbed in the gastrointestinal tract, with most excreted unchanged. Research from peer-reviewed studies highlights its presence in various vegetable sources and its role in lipid metabolism modulation.