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Home » Cholesterol » Triglycerides » What is Triglyceride
What is Triglyceride Any one of an important group of naturally
occurring lipids (fat-soluble components of living cells).
Triglycerides are esters in which three molecules of one or more
different fatty acids are linked to the alcohol glycerol; they are
named according to the fatty acid components; e.g., tristearin contains
three molecules of stearic acid, and oleodistearin, one of oleic acid
and two of stearic acid. The types of triglycerides in animals vary
with the species and the composition of fats in the food.
Triglycerides
in animals and probably in plant seeds function as depots of energy. In
mammals they are stored in adipose tissue until needed, at which time
they are broken down to a molecule of glycerol and three molecules of
fatty acid. The latter combine with albumin, a protein in blood plasma,
and are carried in the bloodstream to sites of utilization.
Triglycerides also serve as insulation and padding for organs in
animals.
Many vegetable triglycerides (oils) are liquid at room
temperature, unlike those of animals; in addition, they contain a
greater variety of fatty acids. Vegetable oils can be hardened by
treatment with hydrogen under pressure.
In alkali, triglycerides are broken down (saponified) to form glycerol and three molecules of soap (salts of the fatty acids).
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