What is Lipid? Definition, Meaning & Example
An organic compound that is mostly hydrophobic (water-repelling) and serves functions including energy storage and cell membrane formation.
TL;DR: An organic compound that is mostly hydrophobic (water-repelling) and serves functions including energy storage and cell membrane formation.
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Lipid: An organic compound that is mostly hydrophobic (water-repelling) and serves functions including energy storage and cell membrane formation.
Explanation
Lipids include fats, oils, waxes, and cholesterol. Fats store more than twice the energy per gram as carbohydrates, making them an efficient energy reserve. Lipids form the phospholipid bilayer that makes up cell membranes. Some hormones are lipids, like testosterone and estrogen. Lipids protect organs and provide insulation. Dietary sources include oils, butter, nuts, and avocados. The body needs some lipids for health, but excess lipids can contribute to health problems. Saturated fats from animal products can increase cholesterol, while unsaturated fats from plants are considered healthier.
Example
Butter and coconut oil are lipids that are solid at room temperature. Olive oil is a liquid lipid at room temperature. Body fat stores energy as lipids.
Frequently Asked Questions
Why do we need lipids if they can be unhealthy?
Lipids are essential for cell membranes, hormone production, vitamin absorption, and energy storage. Healthy amounts and types are beneficial.
What is cholesterol?
Cholesterol is a lipid made by the body and found in animal foods. It is needed for hormones and cell membranes but excess can be harmful.
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