Lipids are biomolecules that are soluble in organic solvents and serve nutritional, structural, and regulatory roles. There are several types of lipids including glycerol-based lipids like triglycerides, sphingolipids, steroids, and eicosanoids. Triglycerides are made of glycerol bonded to three fatty acids and serve as storage lipids. Phospholipids are important components of membranes along with cholesterol and sphingolipids. Cholesterol plays roles in membrane structure and is a precursor for bile acids and steroid hormones. High levels of LDL cholesterol relative to HDL cholesterol increase the risk of heart disease. Eicosanoids like prostaglandins and leukotrienes act as local
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