Vitamin B3 Niacinamide Vitamin B3 - niacin, perhaps also known to the elderly as P. It belongs to the group of B vitamins found in the multiform B-complex. It is a very important group that you need for the proper function of eyesight, mucous membranes, skin, heart... You need it for the proper functioning of heart, muscle and nerve activity. B3 - We need it for energy production, healthy skin and good digestion. Its deficiency (hyovitaminosis) causes depression, pigment skin rashes, weaker cognitive functions and even dementia. On the contrary, its excess (hypervitaminosis) manifests itself in reddening of the skin and itching. The recommended daily dose of vitamin B3 is 13-15mg for women (pregnant up to 17mg), for men 15-20mg. We get it from meat, bacon, liver, dried fruit, coffee, tea. It is one of the vitamins our body can make if we have enough protein and vitamin B6. It makes it from the amino acid tryptophan (from 60mg of tryptophan about 1mg of vitamin B3). Niacin (B3) is commonly found in two forms: nicotinic acid and niacinamide. Nicotinic acid