Study: Dietary Vitamin C Intake Linked to Firmer Skin, Increased Collagen Production
A study published in the Journal of Investigative Dermatology in July 2026 has linked dietary vitamin C intake to measurable improvements in skin thickness and cellular renewal. Researchers from the University of Otago in New Zealand found that vitamin C consumed through food travels through the bloodstream into all layers of the skin, where it supports collagen

