Which fat helps to reduce bad cholesterol level in blood?

RUHS, Jaipur, PB B.Sc Nursing Entrance-2024

Applied Nutrition & Dietetics

Easy

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2024

Explanation

Polyunsaturated fats are considered 'good fats' because they help reduce the levels of Low-Density Lipoprotein (LDL), also known as 'bad cholesterol,' in the bloodstream.
Lowering LDL cholesterol is crucial for preventing the buildup of plaque in the arteries (atherosclerosis), which reduces the risk of heart disease and stroke.
These beneficial fats are found in plant-based foods and oils, such as walnuts, flax seeds, sunflower oil, and fatty fish like salmon.
Polyunsaturated fats include two main types: omega-3 and omega-6 fatty acids, both of which are essential for bodily functions.

Option A: Trans fats are the most detrimental type of dietary fat. They significantly raise LDL ('bad') cholesterol while also lowering HDL ('good') cholesterol, thereby increasing the risk of cardiovascular disease.
Option C: Saturated fats are known to raise LDL ('bad') cholesterol levels in the blood. Diets high in saturated fat are linked to an increased risk of heart disease.
Option D: This option is incorrect because it includes trans fats and saturated fats, both of which negatively impact cholesterol levels by raising the 'bad' LDL cholesterol.

Clinical Relevance

Nursing practice connection: Knowing Dietary fats and their effect on blood cholesterol levels helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
A key nursing role is patient education on diet and lifestyle modifications. Nurses must be able to explain the difference between types of fats and guide patients to make heart-healthy food choices to manage or prevent hyperlipidemia and cardiovascular disease.
When reviewing a patient's diet history, a nurse can identify high intake of saturated and trans fats and provide specific, practical advice, such as using olive oil instead of butter, eating more fish, and avoiding processed snacks.
What if? If a patient has familial hypercholesterolemia (a genetic condition causing very high cholesterol), dietary changes alone may not be sufficient. The nurse's role would expand to include education on the importance of medication adherence (e.g., statins) in conjunction with a strict low-fat diet.

How to Approach the Question

First, identify the core of the question, which is about finding a 'good' fat that 'reduces bad cholesterol'.
Recall the basic classification of dietary fats: saturated, unsaturated (poly- and mono-), and trans fats.
Remember the general health effects: unsaturated fats are generally healthy, while saturated and trans fats are generally unhealthy in excess.
Evaluate each option based on this knowledge. Trans fats and saturated fats are known to increase bad cholesterol.
Polyunsaturated fats are a type of unsaturated fat known to have a positive effect on cholesterol levels.
Conclude that polyunsaturated fats are the correct answer, and eliminate 'All of the above' as the options have conflicting effects.

Concept Tested & Keywords

QnC61ftkaP8w1I50VPmsKi

E6 Nutrition Kumud Khanna 2e p. 296-298

E6 Textbook of Biochemistry for medical StudentsDM Vasudevan Part 2 — Subpart A (pp 1-239 of 478) p. 187-189

E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart A (pp 1-232 of 464) p. 147-149