Green leafy vegetables are a rich source of?

Appeared in: RRB Staff Nurse Kolkata-2015

Explanation

Green leafy vegetables like spinach, kale, and amaranth are exceptionally rich in beta-carotene.
Beta-carotene is a provitamin A carotenoid, which the human body metabolizes and converts into active Vitamin A (retinol).
Vitamin A is a fat-soluble vitamin crucial for night vision, immune function, and maintaining healthy epithelial tissues.

Option B: While leafy greens contain some B vitamins (e.g., folate/B9, riboflavin/B2), they are not considered the richest source for the entire B-complex group.
Option C: Although green leafy vegetables do contain a good amount of Vitamin C, other food sources are significantly richer.
Option D: Green leafy vegetables do not contain Vitamin D. This vitamin is not naturally found in most plant-based foods.

Visual 1: Infographic: A chart displaying various vitamins (A, B, C, D, E, K) and their top food sources, visually highlighting green leafy vegetables under Vitamin A and K.
Visual 2: Diagram: A simple flowchart showing how beta-carotene from plant sources like carrots and spinach is converted into retinol (Vitamin A) in the body.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Nutritional sources of vitamins as background academic context rather than a clinical decision trigger.
Nurses play a key role in patient education regarding nutrition. Knowing the primary sources of essential vitamins is fundamental for counseling patients on preventing deficiencies, such as night blindness and xerophthalmia caused by Vitamin A deficiency.
When advising patients, it's important to suggest consuming fat-soluble vitamins (like Vitamin A from greens) with a small amount of healthy fat (like oil or ghee) to improve absorption.
What if? If a patient presents with symptoms of night blindness, a nurse should consider assessing their dietary intake of Vitamin A-rich foods and anticipate a potential need for supplementation under a doctor's guidance.

How to Approach the Question

This is a factual recall question based on nutritional science.
First, identify the key subject of the question: 'Green leafy vegetables'.
Next, systematically evaluate each option (Vitamin A, B, C, D) by recalling its primary dietary sources.
Compare the association of leafy greens with each vitamin. You'll recall that 'carotenes' in yellow and green vegetables are precursors for Vitamin A.
Eliminate the incorrect options. Vitamin D is the 'sunshine vitamin'. Vitamin C is most famous from citrus. Vitamin B is broadly found in grains and animal products.
Conclude that Vitamin A is the most accurate and well-known nutrient for which green leafy vegetables are a rich source.

Concept Tested & Keywords

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Practise the full RRB Staff Nurse Kolkata-2015

Attempt every question from this paper in a timed mock, then review the full solution for each one.