Question

Which nutrients are most likely to be affected by food processing and storage?

• A. Carbohydrates
• B. Fats
• C. Proteins
• D. Vitamins

Hint:

Ask which nutrient breaks down fastest under heat, light, and time, rather than which one is simply present in the food.

Answer 1

The Correct Option is D

Step 1: Understand what "affected by processing" means here.
Some nutrients are chemically sturdy and survive heat, light, or long storage well, while others break down easily under the same conditions. The question is asking which nutrient group is the most fragile once food is processed, cooked, or kept for a long time.

Step 2: Look at why vitamins are fragile.
Many vitamins, especially vitamin C and the B group vitamins like B1 and folate, are water soluble and heat sensitive. Cutting, boiling, canning, or storing food for long periods exposes vitamins to heat, water, light, and oxygen, all of which break them down. For example, boiling vegetables can wash out or destroy a large share of their vitamin C content within minutes.

Step 3: Compare with the other nutrient groups.
(A) Carbohydrates such as starches are fairly stable to normal cooking and storage, they may change texture through cooking but their basic structure and energy value survive well.
(B) Fats can turn rancid over very long storage due to oxidation, but this happens slowly and is a much smaller loss compared to how quickly vitamins degrade.
(C) Proteins can be denatured by heat, which changes their shape, but this does not usually destroy their nutritional or amino acid value the way heat destroys a vitamin's chemical structure.

Step 4: Final conclusion.
Since vitamins break down fastest and most severely under heat, light, and storage compared to carbohydrates, fats, and proteins, vitamins are the nutrient group most affected by food processing and storage.

Final Answer:
Vitamins, being heat and light sensitive, are lost the most during food processing and storage.