system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How is the fact that milk is good for your bones a myth? Isn't calcium good for bones; and isn't milk filled with it?
gpt
> milk is good for your bones 

This is marketing exaggeration at best, courtesy of the American Dairy Association. Their goal is to sell milk, not to promote health.

It's been accepted as fact for so long that studies actually demonstrating benefits are probably lacking. Such studies are also likely to be funded by the dairy industry, a conflict of interest. Studies looking into drawbacks from milk consumption (such as increased fractures or osteoporosis) are starting to appear.

Simply having calcium in your diet doesn't guarantee stronger bones. The body uses Vitamin D to absorb calcium from food. Bone health is associated with strength training—if your body isn't put under strain, it won't feel the need to make bones stronger. Phosphorus is also needed for bone formation, though the average diet usually contains a suitable amount. Calcium is also used for other purposes, mainly as ions along signalling pathways.