Vitamin classification — Vitamin C (ascorbic acid) is best classified as which type of vitamin based on solubility?

Introduction / Context:
Vitamins are often grouped by solubility because it influences absorption, storage, toxicity, and deficiency risk. Vitamin C is a classic example of a water-soluble vitamin with distinct physiological roles.

Given Data / Assumptions:

• Ascorbic acid is hydrophilic and dissolves readily in aqueous solutions.
• Water-soluble vitamins are not stored in large quantities in the body.
• Fat-soluble vitamins (A, D, E, K) require lipid absorption pathways.

Concept / Approach:
Vitamin C acts as a reducing agent (antioxidant) and cofactor for enzymes such as prolyl and lysyl hydroxylases in collagen synthesis. Its water solubility means excess is excreted in urine and daily intake is important. Therefore, it is categorized as water-soluble.

Step-by-Step Solution:

Verification / Alternative check:
Nutrition guidelines list Vitamin C with B-complex as water-soluble vitamins.

Why Other Options Are Wrong:

• Fat soluble or “fat and water soluble” do not describe ascorbic acid.
• “None” is incorrect because a clear category exists.

Common Pitfalls:
Assuming antioxidant role implies fat solubility; many antioxidants, including Vitamin C, are water soluble.

Final Answer:
Water soluble