Benefits of Vitamin C

Evidence-Based Benefits

• Collagen synthesis — vitamin C is an absolute requirement for prolyl and lysyl hydroxylase enzymes; without it, collagen cannot form stable triple helices, leading to scurvy
• Photoprotection — a systematic review found that oral vitamin C (often combined with vitamin E) reduced UV-induced erythema and sunburn cell formation (Pullar et al., 2017)
• Skin appearance — a cross-sectional study (n=4,025) found higher vitamin C intake was significantly associated with lower likelihood of wrinkled appearance and dry skin (Cosgrove et al., 2007)
• Hyperpigmentation reduction — vitamin C inhibits tyrosinase, the key enzyme in melanin production, reducing dark spots and evening skin tone
• Wound healing — vitamin C deficiency impairs wound healing, and supplementation in surgical patients has been shown to accelerate recovery (Moores, 2013)

What the Research Says

Vitamin C's role in skin health is supported by biochemical necessity and extensive epidemiological data. Pullar et al. (2017) published a comprehensive review in Nutrients concluding that vitamin C is essential for collagen synthesis, provides photoprotection, and improves multiple markers of skin aging. Cosgrove et al. (2007) analyzed data from 4,025 women in the first National Health and Nutrition Examination Survey and found that higher vitamin C intake was significantly associated with lower odds of wrinkled appearance and skin dryness, independent of age, race, and sun exposure. While topical vitamin C (10-20% L-ascorbic acid) has the most direct evidence for skin improvements, oral supplementation maintains the systemic antioxidant pool necessary for ongoing collagen production and UV defense.

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