Vitamin C, B vitamins such as Biotin (Vitamin B7 or Vitamin H) and Niacin (Vitamin B3) have been shown to be essential vitamins for hair growth. PABA helps in the utilization of pantothenic acidis important for healthy skin & hair pigment,even may restore grey hair to original color when used with inositol, folic acid & pantothenic acid (vitamin B5), if greying was due to stress or deficiency in the B vitamins.
Vitamins C and E are antioxidants and may be valuable, in doses many times the minimum requirement, in combatting the damaging effect of FREE RADICALS Folic acid supplements are valuable in preventing NEURAL TUBE DEFECTS Vitamins are conventionally divided into the fat-soluble group A, D, E and K, and the water-soluble group, vitamin C (ascorbic acid) and the B vitamins-B1 (thiamine), B2 (riboflavine, riboflavin), nicotinic acid, B6 (pyridoxine), pantothenic acid, biotin, folic acid and B12.
Vitamins are needed for the proper synthesis of body building material, HORMONES and other chemical regulators; for the biochemical processes involved in energy production and nerve and muscle function; and for the breakdown of waste products and toxic substances.
Fetuses and children are not grown-ups: Children have special vitamins for a reason - their bodies need different things than adults do. Treat childrens supplements like any other medication; they may taste like candy, but letting your child take more than the recommended dose can have significant consequences.
There appears to be no consensus on any vitamins Q, R, T, V, W, X, Y or Z, nor are there substances officially designated as Vitamins N or I, although the latter may have been another form of one of the other vitamins or a known and named nutrient of another type.