Vitamin D (a group of fat-soluble vitamins) can take many forms. For example, D2 (Ergocalciferol) and D3 (Cholecalciferol). D2 can be found in certain vegetables and mushrooms. D3 is only available from animal sources and through the sun. The most commonly used in supplements is D3, as it is the most effective. Among other functions, vitamin D contributes to the normal metabolism of calcium and phosphorus, essential for maintaining strong bones and teeth; it helps the immune system to be healthy and maintain normal muscle function. Vitamin D contributes to the absorption and use of calcium and phosphorus. It contributes to the normal functioning of the immune system. It contributes to the maintenance of normal muscle function. It contributes to the maintenance of normal bones and teeth. Vitamin K contributes to the maintenance of bones in normal condition. It is recommended to take 1 tablet a day with meals. Food supplements should not be used as a substitute for a balanced and varied diet and a healthy lifestyle. Do not exceed the recommended daily dose. Only recommended for adults. Keep out of reach of young children. Store in a cool, dry place, protected from light.