I took my wife to a physiotherapist (good fun getting the wife to say that) today and one of the things that cropped up, although a bit off topic, was sources of calcium. I had been on at Mrs Lastlid to drink more milk as she seemed to drink very little, worrying that she might end up calcium deficient. However, what I learned was that all that fish and fish bones that she eats does the job just aswell. I had never thought of it like that as I eat so little fish. Whereas the wife is mad for it.