50 gr. butter replenishes 1/3 of the daily requirement of vitamin A, which the body needs to maintain visual acuity and the functioning of the immune system. Vitamins (A, D, E, K) contained in butter are perfectly absorbed by the body, they are needed by a person to strengthen bones and teeth, healthy hair and skin, and maintain the activity of the nervous system. Butter contains selenium, which is a powerful antioxidant that scavenges free radicals from the body. Butter also contains the amino acid tryptophan, which promotes the production of serotonin (the “hormone of happiness”), which improves mood, reduces sugar cravings and improves sleep.