About Ruderalex vitamin D3 4000iu with K2 mk-7 100mcg tablets More and more people stay indoors due to having a sedentary lifestyle or due to other factors, are not having optimal vitamin D levels. Ruderalex vitamin d3 4000iu plus vitamin k2 100ug 120 high strength tablets are the perfect solution for optimising your vitamin D3 levels. These feature a high strength dose of vitamin d3 4000 iu derived from Cholecalciferol and a premium grade vitamin k2 at 100mcg which is in the form of MK7 (Menaquinone-7). Taking a high dose of vitamin d3 can raise your blood calcium levels, buy adding a sufficient dose of vitamin k the calcium will be directed to bones and teeth instead of elsewhere in the body .