Food supplement based on Vitamin D3. Presentation: 120 pearls of 291mg. Net quantity: 34.92 g. Directions for use: Take 1 pearl daily. Nutravit Complex: Vitamin D is a nutrient present in foods and 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 normal bones; to normal muscle function; to the normal function of the immune system; and contributes to cell division.