O

H3C-(CH2)n-COH

Saturated Carboxyl aliphatic group carbon chain

Small amounts of odd-numbered, straight-chain acids, branched chains, and cyclical acids are also present in edible vegetable oils (9,14).

The length of the chain can vary in edible fatty acids from as few as 4 carbons to as many as 24. Most fats predominately contain fatty acids that are 16 or 18 carbons long, although there are some exceptions like coconut oil, palm kernel oil, and butterfat, which contain high percentages of shorter (8—14 carbons) chain fatty acids.

The fatty acids are classified by structure:

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