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Vitamin C — Frequently Asked Questions

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

Frequently Asked Questions

Should I take vitamin C orally or apply it topically for skin?

Both approaches have distinct benefits and using them together is optimal. Oral vitamin C maintains systemic levels needed for collagen synthesis throughout the body. Topical vitamin C (10-20% L-ascorbic acid, pH < 3.5) delivers high concentrations directly to the skin for photoprotection and brightening. Oral supplementation alone cannot achieve the skin concentrations that topical application provides.

How much vitamin C do I need for collagen production?

The RDA of 75-90 mg prevents scurvy, but optimal collagen synthesis likely requires higher intake. Research suggests 500-1,000 mg daily for skin benefits. Absorption efficiency decreases above 200 mg per dose, so splitting into two doses improves utilization. Smokers need an additional 35 mg/day due to increased oxidative stress.

Does vitamin C help with dark spots and skin brightening?

Yes. Vitamin C inhibits tyrosinase, the enzyme responsible for melanin production, helping to fade dark spots and even skin tone. While topical vitamin C is more effective for targeted brightening, oral supplementation provides body-wide antioxidant support that helps prevent new pigmentation from forming, especially from UV exposure.

Full Vitamin C Guide

References

  1. (). The roles of vitamin C in skin health. Nutrients. DOI
  2. (). Dietary nutrient intakes and skin-aging appearance among middle-aged American women. American Journal of Clinical Nutrition. DOI
  3. (). Vitamin C: a wound healing perspective. British Journal of Community Nursing. DOI
  4. (). Vitamin C in dermatology. Indian Dermatology Online Journal. DOI