Trans Fatty Acids Table
Nutrition & Sports Nutrition Reference Tables
Trans Fatty Acids Table
Trans describes double-bond geometry; industrial and ruminant sources occur in different food contexts.
| Source | Example context | Interpretation |
|---|---|---|
| Partially hydrogenated oils | Historical industrial source | Avoid industrial trans fat |
| Ruminant fat | Some dairy and meat | Contains small naturally occurring trans fractions |
| Label declaration | Jurisdiction-specific rounding | Check ingredients as well as declared amount |
| Replacement | Unsaturated fats | Do not replace mainly with saturated fat |
Trans Fatty Acids (TFAs) contain at least one trans-configured double bond, remain chemically unsaturated and include multiple individual fatty acids.
A double bond restricts the free rotation possible around a single bond. Cis geometry places chain segments on the same side and usually introduces a bend; trans places them on opposite sides. A trans fatty acid remains chemically unsaturated, but its nutritional implications should not be equated with those of ordinary cis-unsaturated fats.
Saturation concerns carbon–carbon double bonds in a fatty-acid chain, not fullness after eating or a food's energy content. One double bond defines monounsaturation; multiple bonds define polyunsaturation. Their positions and cis or trans geometry also matter, so counting bonds alone cannot explain every physical property or biological effect.
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