I have recently purchased "Seen Chews". They are Calcium chews made by two Doctors in the US both with personal experience with osteoporosis . Goggle it and read all about it. They are strictly made from 4 food sources. ONLY food. They are tasty and easy to digest. You can take anytime, with or without food because they are food!! In my understanding they are in the works of creating the K2 but for now it is not available. K2 is hard to source from food. So I am going to supplement with added D3 + K2 along with the chews.