Food Supplement based on Vitamin D3. Presentation: 120 pearls of 291 mg. Net quantity: 34.92g. Instructions for use: Take 1 pearl a day. Nutravit Complex: Vitamin D is a nutrient present in foods that is very necessary for health. Lack of vitamin D causes weak bones, bone pain, and muscle weakness. Vitamin D contributes to the normal absorption and utilization of calcium and phosphorus; to the maintenance of normal blood calcium levels; to the maintenance of bones in normal conditions; to normal muscle function; to the normal functioning of the immune system and contributes to the process of cell division.