Definition & Meaning of "lipid"

What is "lipid"?

Lipids are a diverse group of molecules that include fats, oils, and certain components of cell membranes. They are insoluble in water and primarily consist of hydrocarbons, including fatty acids and cholesterol. Lipids serve various essential functions in the body, such as providing energy, insulating and protecting organs, and serving as structural components of cell membranes. Types of lipids include triglycerides, phospholipids, and sterols. Triglycerides, found in fats and oils, are a major source of energy storage in the body. Phospholipids are crucial components of cell membranes, helping to maintain their structure and function. Sterols, such as cholesterol, are important for the production of hormones and vitamin D. While lipids are necessary for health, an imbalance or excessive intake of certain types, particularly saturated and trans fats, can contribute to health issues such as heart disease.