This article has been double-blind peer reviewed In this article The role vitamin A plays in vision, and the effects of deficiencies on ocular health and function How vitamin A maintains epithelial integrity and immune function The effect of vitamin C on collagen production and what causes scurvy Key points Vitamin A is fat soluble and can be obtained directly or indirectly from food A deficiency of vitamin A can cause night blindness Humans cannot synthesise vitamin C so must obtain it directly from their diet Vitamins A and C are essential for maintaining healthy skin and a healthy immune system Chronic vitamin C deficiency may result in scurvy
The results showed that L-Carnitine supplementation reduced post-operative complications, improved wound healing, and shortened the length of hospital stay
Appl Water Sci 15 , 146 (2025)
When your brain lacks energy, you may experience mental fatigue, reduced focus, and slower processing speeds
Duration : Benefits, when they occur, typically require several weeks to months of consistent supplementation
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