Actually, it's VITAMIN A. This describes a fat-soluble nutrient that can be derived from beta-carotene. In humans it is used extensively by the body for many functions including sight.
Some athletes believe that vatamin B12 injections will increase oxygen supply to the muscles. But according to a Wichita Eagle article - The absence of a vitamin B12 deficiency does not support this.
Ilan araw matatagal ang shabu sa katawan at pd ba ang tubig lang
Eating a well-balanced diet that contains all of the essential vitamins can help maintain your good hair health. Although there is no evidence to suggest that individual vitamins can encourage the hair to grow faster, deficiencies in specific vitamins can lead to hair loss or thin, brittle hair. Consuming enough of each vitamin in the diet may help keep the hair healthy. The following vitamins support hair growth: vitamins D vitamin E B complex vitamins