Nukalsin Sachet contains Cholecalciferol (Vitamin D3). Vitamin D3 is essential for the proper growth and development of the body. It is synthesized within the body after exposure to sunlight and is essential for many important functions of the human body. Vitamin D3 in Nukalsin sachet also increases the Calcium absorption from the intestines. Nukalsin sachet is available commercially in the form of sachets containing granules of cholecalciferol (Vitamin D3). Each Nukalsin sachet weighs about one gram and contains 60,000 international units of Cholecalciferol. Directions to use:- 1. Tear open the sachet. 2. Pour the powder into a glass and then add water 3. Drink the mixture. Use under medical supervision.