Vitamin A
Cross-source consensus on Vitamin A from 29 sources and 119 claims.
29 sources · 119 claims
Uses
How it works
Benefits
Dosage & preparation
Risks & contraindications
Interactions
Comparisons
Evidence quality
Where it comes from
Highlighted claims
- Vitamin A (retinol) is essential for building connective tissue, protecting skin cells from aging, and supporting skin immune function. — The #1 Best Food for Aging Skin
- Vitamin A deficiency directly causes acne. — Many Causes of Acne: Hormones, Nutrients, and Diet
- Accutane is a synthetic derivative of vitamin A, and its mechanism of action confirms the causal link between vitamin A deficiency and acne. — Many Causes of Acne: Hormones, Nutrients, and Diet
- Vitamin A is fat-soluble and requires bile for proper absorption. — Many Causes of Acne: Hormones, Nutrients, and Diet
- Individuals without a gallbladder must take purified bile salts alongside cod liver oil to restore the vitamin A absorption pathway. — Many Causes of Acne: Hormones, Nutrients, and Diet
- Carotenoids are the pigment responsible for yolk color. — Egg Yolk Color: Pasture-Raised vs. Factory Farm Eggs
- The active form of vitamin A the body needs is retinol, not beta-carotene. — Top Diseases That Are Really Nutrient Deficiencies
- Only 3% of dietary beta-carotene converts to usable retinol in the body. — Top Diseases That Are Really Nutrient Deficiencies
- Obtaining 9,000 mcg of retinol requires only 3 ounces of beef liver, but would require 40 pounds of raw carrots. — Top Diseases That Are Really Nutrient Deficiencies
- Vitamin A is essential for the synthesis of rhodopsin, the photopigment in rod cells responsible for low-light vision. — Cod Liver Oil vs. Fish Oil: Is there a Difference?