"Promote growth and maintain the normal function of the skin. Vitamin A includes vitamin A1 and vitamin A2. Generally speaking, vitamin A generally refers to A1. The cod liver oil is rich in vitamin A, and many yellow-green plants, such as carrots and tomatoes. It is also rich in vitamin A. Vitamin A can promote growth, maintain epithelial cell tissue, and maintain the normal function of skin, conjunctiva, and cornea.
Vitamin A can also enhance the sensitivity of the retina and participate in many oxidation processes in the body, especially for the oxidation of unsaturated fatty acids. When vitamin A is lacking, growth stops, bones will grow poorly, and reproductive function will be affected, resulting in reproductive function decline, skin roughness, dryness, keratosis, and dry ophthalmia, and even night blindness."