Vitamin C

Vitamin C (ascorbic acid) is a water-soluble essential vitamin that humans cannot produce — we must get it from diet or supplements. It's fundamental to immune function, collagen synthesis, and antioxidant defense.

Immune Function

Vitamin C accumulates in immune cells at concentrations 10–100x higher than blood plasma. It supports the function of both innate and adaptive immunity — enhancing neutrophil activity, lymphocyte proliferation, and antibody production.

Collagen Cofactor

Without vitamin C, your body cannot synthesize collagen. This is why scurvy (severe vitamin C deficiency) causes connective tissue breakdown. Even mild deficiency impairs wound healing and skin health.

Antioxidant Synergy

Vitamin C regenerates other antioxidants, including vitamin E and glutathione. It pairs particularly well with NAC, as both support the glutathione system from different angles.