Sunvit 40K is a high-potency vitamin D3 (colecalciferol) supplement manufactured by Pharmasia Limited. Each capsule contains 40,000 IU of vitamin D3, designed to address significant deficiencies or to maintain optimal levels in individuals at risk. Vitamin D3 plays a crucial role in calcium and phosphate absorption, supporting bone health, immune function, and overall well-being. Sunvit 40K is typically prescribed for short-term correction of severe vitamin D deficiency, with maintenance doses adjusted based on individual needs and medical guidance. It is important to use this supplement under medical supervision, especially due to the high dosage, to prevent potential side effects such as hypercalcemia.