Vitamin C Unit Converter

Vitamin C (also called ascorbic acid) is a water-soluble vitamin that plays essential roles throughout the body. Unlike most animals, humans cannot produce vitamin C internally and must obtain it entirely from food or supplements.

A vitamin C blood test measures the concentration of ascorbic acid in your plasma or serum. This reflects your recent dietary intake and helps assess whether your body has adequate vitamin C stores.

The body's vitamin C pool can become depleted within 1-3 months of inadequate intake, potentially leading to deficiency symptoms or, in severe cases, scurvy.

Vitamin C must be obtained entirely through diet because humans lack the enzyme needed to produce it. The best sources are fresh fruits and vegetables, especially citrus fruits, berries, bell peppers, tomatoes, broccoli, and leafy greens.