HydroxyCal 120 Caps by Karuna is a dietary supplement that provides the body with a blend of complex nutrients designed to support optimum bone health. Among the key ingredients included in HydroxyCal 120 Caps by Karuna is calcium. Vitamin K. and Vitamin D in the preferred D3 format for faster absorption by the body. In addition. this formula features Vitamin C and manganese to foster bone density and prevent bruising.