The lowest effective daily dose of vitamin D is 1000-2000 IU, while the recommended therapeutic doses in the case of adults and elderly people are 7000-10000 IU of vitamin D per day, which is important especially in the fall-winter season, when the skin synthesis is considerably limited.
Because of the fact that vitamin D is a compound soluble in fats, in order to ensure its best absorption, it should be taken with a meal containing fat.
Vitamin D belongs to fat soluble vitamins, occurs in three forms: calciferol (vitamin D1) ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3), it is formed under the action of sunlight for at least 15 minutes per day. In the absence of sunlight it should be administered in the diet in the form of fish oil (Vitamin A + D3) and fish oils. It is responsible for the absorption of calcium and phosphorus. It is the building substance of bone tissue particularly necessary during pregnancy, childhood, and for athletes. It is a component of dietary supplements and nutrients among competetive athletes. Deficiency of vitamin D causes children growth inhibition, and rickets.
For adults - deficiency causes osteomalacia.
Excess of vitamin D causes headaches, alopecia, nausea, drowsiness, blurred vision, pain in the long bones, the deposition of calcium deposits.
Dosage: 400 IU units during the day.