Trans Fats
No description yet. This curated deck is ready for daily study.
Card preview (20)
What are trans fats?
Trans fats are artificially produced unsaturated fats created through hydrogenation, where hydrogen atoms are added to unsaturated oils, making them more solid at room temperature.
What process is used to produce trans fats?
The process is called hydrogenation — it involves adding hydrogen to double bonds in unsaturated fatty acids, converting them into a more saturated form.
How does the structure of trans fats differ from that of unsaturated fats?
In trans fats, the hydrogen atoms attached to the carbon double bond are on opposite sides (trans configuration), whereas in natural unsaturated fats (cis fats), the hydrogens are on the same side (cis configuration).
What is the structural consequence of the trans configuration in fatty acids?
The trans configuration makes the molecule straighter, allowing it to pack tightly like saturated fats, making it solid or semi-solid at room temperature.
How do saturated fats differ from unsaturated and trans fats in structure?
Saturated fats: Have no double bonds between carbon atoms (fully “saturated” with hydrogen). Unsaturated fats: Have one or more double bonds causing bends in the chain. Trans fats: Have double bonds in a trans configuration, making them straight despite being unsaturated.
What are examples of foods high in saturated fats?
Butter, cheese, red meat, and coconut or palm oil.
What are examples of foods high in unsaturated fats?
Fish, nuts, seeds, avocados, and vegetable oils.
What are examples of foods that used to contain trans fats?
Margarine, fried foods, microwave popcorn, baked goods, frosting, and processed snacks.
Why are trans fats harmful to human health?
They increase LDL (“bad”) cholesterol and decrease HDL (“good”) cholesterol, promoting atherosclerosis — the buildup of fatty deposits in arteries.
What diseases are associated with the consumption of trans fats?
Coronary heart disease, stroke, and other cardiovascular diseases.
How do trans fats affect the cardiovascular system?
By increasing LDL and lowering HDL, they clog arteries, reduce blood flow, and increase the risk of heart attack and stroke.
What did studies in the 1990s reveal about trans fats?
They were linked to about 50,000 deaths per year in the U.S. due to heart disease.
What regulatory actions were taken against trans fats?
The FDA declared trans fats not “Generally Recognized as Safe” in 2015, and they were banned from U.S. foods by 2018.
What is the biological reason for the ban on trans fats?
Their negative impact on lipid profiles and heart health far outweighs any functional benefit in food preservation.
What is the difference between trans fats and other unsaturated fats in terms of biological function?
hile natural unsaturated fats support healthy cell membranes and hormone production, trans fats disrupt lipid metabolism and increase cardiovascular risk.
What are the naturally occurring types of trans fats, and how are they different?
Small amounts occur naturally in dairy and meat from ruminants, but these do not have the same harmful effects as artificial trans fats.
Which types of fats are considered beneficial for health?
Monounsaturated and polyunsaturated fats (found in fish, nuts, and plant oils) — they lower LDL and raise HDL cholesterol.
What is LDL cholesterol and why is it dangerous?
Low-Density Lipoprotein (LDL) carries cholesterol to tissues; excess amounts can deposit cholesterol in artery walls, leading to atherosclerosis.
What is HDL cholesterol and why is it beneficial?
High-Density Lipoprotein (HDL) removes excess cholesterol from the bloodstream, reducing the risk of heart disease.
How does hydrogenation alter the physical properties of oils?
It converts liquid oils into semi-solid or solid fats, extending shelf life and improving texture in processed foods.