Cholestrol is a short lipid molecule. It is a vital component of cell membranes with roles in their organisation and functioning. Cholestrol is essential for good health. Cholestrol is made in the liver from saturated fats and also obtained in our diet, found associated with saturated fats in foods such as eggs, meat and dairy products. Howeer there are concers that too high a blood cholesterol can be bad for us.
Phospholipids are similar to triglycerides but one of the fatty acids is replaced by a negatively charged phosphate group. Phospholipds are important components of cell membranes.
As well as supplying energy in the diet, fats also provide a source of essential fatty acids, that is, fatty acids that the body needs but cannot synthesis.
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