Vitamins D & K are fat soluble vitamins and play an essential role in maintaining the organism in a good condition. Vitamin D3 is produced in the skin through the photolytic action of ultraviolet radiation. Besides the fact that each organism can produce Vitamin D3, the modern lifestyle and the inadequate exposure to sunlight result to Vitamin D3 deficiency, which must be supplemented through nutrition.
Vitamin K is a cofactor in a number of biochemical pathways and it can be found in leafy green vegetables andin fermented dairy products. 

Vitamin D3 contributes to:

Vitamin K2 contributes to: