Vitamin D can be created by the body when the skin is exposed to sunshine for a small amount of time. Certain factors such as amount of melatonin, lack of sunshine and certain lifestyles can diminish Vitamin D stored within the body. A lack of Vitamin D can cause lethargy, tiredness, muscle problems, bone pains and mood changes. Certain health problems such as a weak immune system may be assisted by Vitamin D. Supplementation with Vitamin D alongside a healthy diet can contribute to the normal absorption and utilisation of calcium and phosphorus (which contribute to normal bones and normal teeth). Vitamin D is also used within the body for the normal function of the immune system. Vitamin D also contributes to normal blood Calcium levels and has a role in cell division. Recommended Daily Intake of Vitamin D3 2000iu Tablets: Adults, one tablet daily. Do not exceed recommended daily intake unless advised by a suitably qualified person. Vitamin D3 2000iu Tablets are: - Free from Gelatin, Yeast, Nut - Free from Artificial Colours, Flavourings and Preservatives - Suitable for Vegetarians INGREDIENTS: Each Vitamin D3 Tablet 2000iu contains (average): Vitamin D3 2000IU 50ug Bulking Agent (maltodextrin, microcrystalline cellulose), Vitamin D3 [(cholecalciferol), sucrose, acacia, corn, starch, medium chain triglycerides, dl-alpha tocopherol], Anti-caking Agent (silicon dioxide, veg. stearic acid, veg. magnesium stearate).