Calcitriol + Calcium citrate + Magnesium + Zinc is a combination of vitamins and minerals. Calcitriol works by helping the body utilize more of the calcium present in ingested foods or supplements and regulating the body's production of parathyroid hormone. Calcium citrate prevents or treats negative calcium balance. Magnesium oxide is a mineral supplement essential for bone mineralization and the formation of the bone matrix. Zinc is needed for the body's immune system to work properly. It also promotes bone density and prevents bone loss.

Boron might be important for bone growth and formation, possibly by affecting osteoblast and/or osteoclast activity or by influencing serum steroid hormone levels and calcium metabolism. Manganese is a cofactor for several enzymes involved in bone formation. In animals, manganese deficiency can impair bone formation and reduce bone mineral density, and manganese supplementation can increase both bone mineral density and bone.