Fruits, Vegetables and cereals are potent source of?

WCL Staff Nurse - 2019

Biochemistry & Nutrition

Easy

Appeared in: WCL Staff Nurse - 2019

Explanation

Fruits, vegetables, and whole grains are the richest dietary sources of antioxidants, which are compounds that protect cells from damage.
These foods provide a wide array of antioxidants, including Vitamin C, Vitamin E, carotenoids (like β-carotene and lycopene), and various polyphenols.
Antioxidants work by neutralizing free radicals, which are unstable molecules that can cause oxidative stress, leading to chronic diseases like heart disease and cancer.
For example, citrus fruits are high in Vitamin C, carrots are rich in β-carotene, and whole grains provide Vitamin E and selenium.

Option B: Unsaturated fats are primarily found in oils, nuts, seeds, and fatty fish. While some fruits like avocados contain them, they are not a defining characteristic of fruits, vegetables, and cereals as a group.
Option C: Saturated fats are mainly found in animal products (e.g., red meat, butter) and some tropical oils (e.g., coconut oil). Fruits, vegetables, and cereals are naturally low in saturated fat.
Option D: Free radicals are harmful, unstable molecules that antioxidants fight against. Foods rich in antioxidants help to neutralize free radicals; they do not provide them.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Dietary Sources of Antioxidants as background academic context rather than a clinical decision trigger.
Nurses play a crucial role in educating patients on the importance of diet for disease prevention. Recommending a diet rich in fruits, vegetables, and whole grains is a cornerstone of preventive healthcare.
A high intake of antioxidants is linked to a lower risk of chronic diseases, including cardiovascular disease, type 2 diabetes, and certain types of cancer.
What if? If a patient has chronic kidney disease and must restrict potassium, a nurse's dietary advice must be more specific. Instead of high-potassium sources like bananas and potatoes, the nurse would recommend low-potassium, high-antioxidant options like apples, berries, cauliflower, and cabbage.

How to Approach the Question

First, analyze the question to identify the core subject. Here, the subject is the primary nutritional contribution of 'Fruits, Vegetables and cereals'.
Next, evaluate each option based on general nutritional knowledge.
Consider Option A: 'Anti-oxidants'. Recall that fruits and vegetables are widely promoted for their health-protective properties, which are attributed to antioxidants like vitamins and phytochemicals.
Consider Option B and C: 'Unsaturated fats' and 'Saturated fats'. Recognize that fats are not the primary macronutrient in most fruits, vegetables, and cereals (with exceptions like avocados and olives).
Consider Option D: 'Free radicals'. Understand that free radicals are harmful molecules, and it is illogical for healthy foods to be a potent source of them. In fact, these foods help combat free radicals.
Conclude that 'Anti-oxidants' is the most accurate and logical answer describing a key benefit of these food groups.

Concept Tested & Keywords

QJ9mTsdXNuL9h4Uq7nPHsZ

E6 Biochemistry U Satyanarayana— Part 2 (pp 421-820 of 840) p. 288-290

E6 Nutrition Kumud Khanna 2e p. 387-389

E6 Nutrition Monika Sharma 3e p. 188-190