Medications/treatments don't always play well with some foods and/or supplements.
Some of what I have gleaned is that calcium tends to deposit in soft tissues without sufficient Vitamin K2 to activate a body protein or two that signals calcium to direct where it should go.
Interesting people regarding K2:
Weston A. Price (dentist)
Dr. Kate Reaume-Bleue
Interesting people regarding calcium deposits in relation to arteries/heart disease:
Dr. David Diamond (neuro-scientist)
Ivor Cummins (bio-engineer)