I researched several products offering Vitamin K2 and chose the Sports Research product for a number of reasons. First of all, it is using the trademarked form of MenaQ7 mentioned above. This product is known for its purity and accurate concentration. Second, this form of Menaquinone is made without soy but uses the same fermentation process which produces the Japanese food natto.
People who consume this fermented soy product suffer from osteoporosis or hardened arteries at a much lower rate than those who do not. Finally, I found the customer service line at Sports Research helpful and informative. The product is assembled in Brea, CA by Uni-Cap LLC from materials provided by Sports Research (SR) and using the formulation specified by SR. using GMP (Good Manufacturing Process) standards.
It also provides the generally recommended dose(100 mcg) in an easy to swallow gel-cap.