Sterols is the plural form of the noun sterol. Sterols are any
group of unsaturated steroid alcohols that occur naturally. They
are usually waxy solids.
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Sterols are in fact lipids. One such sterol lipid is known as
cholesterol. Cholesterol is found in body tissues such as the
nerves and blood.
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Not exactly, sterols are a subgroup of steroids and contain ring
structured carbons. Triglycerides on the other hand have a glycerol
backbone attached to three fatty acid units. Both sterols and
triglycerides are lipids.