Which statement about trans fatty acids is true?

Trans fatty acids are primarily known for their detrimental impact on health, particularly regarding cholesterol levels. When consumed, trans fats can lead to an increase in low-density lipoprotein (LDL) cholesterol, commonly referred to as "bad" cholesterol. Higher levels of LDL cholesterol are associated with an increased risk of heart disease and other cardiovascular conditions.

This increase is a significant concern in dietary guidelines, which aim to limit the intake of trans fats due to their negative effects on lipid profiles and overall heart health. It's crucial for individuals to be aware of the sources of trans fatty acids, often found in partially hydrogenated oils used in processed foods, and to understand their harmful impacts to make informed dietary choices.

The other statements do not accurately reflect the characteristics of trans fatty acids. While some trans fats can be found in certain plant-based foods due to processing methods, they are not exclusively present in these foods. Trans fats are not necessary for cell metabolism, as there are healthier fatty acid alternatives that fulfill metabolic needs. Additionally, although fats in general are a source of energy, trans fats specifically are not considered a good source of energy due to their health risks.