Many Americans retain more than one day's worth of meals that are slowly trying to exit. There are unnatural patterns introduced during ordinary straight pipe pumping even of fresh ground water. Most distilled water does not address this. Exercising sore muscles can kill off muscle fiber cells for ever. There are ways to counter this effect.
Antacids interact with stomach HCl to create sludge as well as diminish digestive action.
Especially ill-advised in seniors, whose HCl is usually diminished anyway. The latter I haven't studied, but the former is a clever industrial hoax. 15 Nobel Prize lorreates in biochemistry ask for proof of ANY human nutritive value of fluroide. Most Calcium supplements are not very absorbable, though there is a possible link for curing cancer with it. To absorb it, reduce acidic diet first.