After approximately 6 years of warfarin based anti-coagulation therapy my blood vessels are utterly destroyed as evidenced by the results of a recent specialized MRI called an MRV. Knowing what I know today about warfarin and the calcium paradox I will *never* take any form of warfarin ever again, especially after all the adverse reactions I have endured. Warfarin is a Vitamin K antagonist - which means warfarin depletes vitamin K. Vitamin K is required for blood vessel health AND bone health. When the blood vessels become inflamed and begin cracking from lack of Vitamin K, the body will respond by lining the blood vessels with calcium thereby causing Arteriosclerosis aka hardening of the arteries. In the meantime, the body is taking the calcium from the bones thereby causing them to become more brittle (osteoporosis) to then line the blood vessels. When I have explained this to certain medical doctors some of them have had a reaction of "oh my..." then they grow quiet as they think of all the patients they have treated who were on warfarin anti-coagulation therapy... It is a sad state of affairs indeed when medical doctors need to be educated by their patients. When I take Vitamin K to repair my cardiovascular and bone health, I look for MK-7 for the best source of Vitamin K2. I trust Jarrow Formulas to provide a quality product at a reasonable price point. The Vitamin K2/MK-7 in this formulation is derived from the Japanese fermented food called "natto" which is boiled soybeans fermented with a special bacteria. Natto smells awful yet tastes relatively okay but is not widely available here in the US outside of Japanese restaurants and Japanese groceries. The problem with unfermented soybeans are they contain phytoestrogens; fermenting soybeans (real soy sauce, tofu, natto, etc) helps to break down the phytoestrogens while creating or releasing beneficial vitamins and enzymes. Jarrow Formulas MK-7 also contains evening primrose oil but does NOT contain wheat, gluten, dairy, egg, fish/shellfish nor peanuts/tree nuts per the label. 90 mcg is currently equivalent to 112% DV. *** DO NOT TAKE MK-7 IF ALSO TAKING WARFARIN or COUMADIN ANTI-COAGULATION THERAPY UNLESS DOING SO UNDER THE GUIDANCE OF A QUALIFIED MEDICAL PROFESSIONAL **