I hate to say this but DUH! This is an easy one. They do not have diets or supplements that include vitamin K2. Their skeletons take a lot of stress and the little k2 in their bodies probably goes to the stressed points. Teeth are probably at the back of the line.
Athletes need 4x a year vitamin d3 testing and adjusting their blood levels to keep them over 60 at least. K2 needs to be supplemented along with the D3. They need to keep testing because sometimes they are getting sun and sometimes not, etc.
What is K2?
YES...what YOU said!