Sterols, also known as steroid alcohols, are a group of naturally occurring compounds found in plants and animals. These compounds are known for their ability to lower cholesterol levels, making them an essential component of a healthy diet. Some common synonyms for the word 'sterols' include phytosterols, plant sterols, ergosterol, cholesterol precursors, and stigmasterol. Phytosterols, in particular, are widely used as additives in food products to help reduce cholesterol levels. Ergosterol, on the other hand, is found in fungi and is used to synthesize vitamin D. These synonyms for 'sterols' all refer to similar compounds that have important benefits for human health.