I will stick with vitamin K1 from food, which is safer. The body naturally makes K2 anyway. MK-7 can build up in the body, so it's a risky vitamin. I wish I had never heard of this toxic stuff. I thought MK-7 was safe because it came from food (and some sites said K3 is toxic and K1 and K2 are safe), but I was wrong. Vodka also comes from fermented food. Vitamin K2 MK-7 is an extremely dangerous fat-soluble vitamin and it has risks. Some vitamin K2 MK-7 side effects are decreased appetite, decreased movement or activity, difficulty in breathing, enlarged liver, general body swelling, irritability, muscle stiffness, paleness, yellow eyes or skin, difficulty in swallowing, fast or irregular breathing, lightheadedness or fainting, shortness of breath, skin rash, Hives and/or itching, swelling of eyelids, face, or lips, tightness in chest, troubled breathing and/or wheezing, blue color or flushing or redness of skin, dizziness, fast and/or weak heartbeat, increased sweating, and low blood pressure (temporary). These side effects came from the Mayo Clinic under vitamin K side effects. Vitamin K2 MK-7 is more toxic than vitamin K1. Like multivitamins, vitamin K2 MK-7 is basically a dangerous scam. Vitamin K and vitamin A are both dangerous fat-soluble vitamins. Vitamin D is now the only fat-soluble vitamin I use. MK-7 is probably the most dangerous vitamin. Jarrow says 90 mcg is 112% of the DV, but I think that is deceptive, because vitamin K1 and vitamin K2 MK-7 are different. People with liver disease should definitely not use vitamin K2 MK-7, because it does accumulate. Also, vitamin K may inadvertently cause more damage to a diseased or damaged kidney, so if you suffer from kidney disease, avoid taking vitamin K supplements and consult with your doctor concerning vitamin K in your diet