vK2 is pharmaceutical grade vitamin K2, providing BOTH MK4 (5 mg) AND MK7 (100 mcg). vK2 is made in the USA, the ingredients are European sourced and have a natural yellow color. buyer beware . . . most brands of Vitamin K2 are NOT yellow, meaning they are NOT pharmaceutical grade and likely contain Chinese ingredients (with a low percentage of the bioactive "trans" form).