I know vinegar does that as it makes the calcium go to the bones.
they gave apple cider vinegar to some cows and no others and the butchers found those not given the vinegar had easy to saw through bones and hard flesh and joints and arteries.
On the other hand the cows given vinegar over their ration had hard to cut through bones and tender flesh etc indicating the calcium was going to the ones (and teeth) and not the joints and arteries.
ok I decided to look a little and found it was done on humans and I dont think in prison I think they might have been people scheduled for surgery