Viridian D3 & K2 Veg 90 CapsVitamin D3 & K2 is a balanced combination of two essential nutrients. Vitamin D and K contribute to the maintenance of normal bones, and vitamin D also contributes to the maintenance of normal muscle function, normal teeth and the function of the immune system. Vitamin D is often referred to as the sunshine vitamin as it is naturally produced under the skin following exposure to sunlight. During winter periods we cant make vitamin D from sunlight