Calcium interferes with power generation, lowering the energy they can deliver to the cells they live in. With lower energy, the cells stop responding to some of the signals to get out there, divide, create new tissue to replace old tissue. It is said that the difference between young flesh and old flesh, is that young flesh has small cells which readily divide to replace any that may die. The cells in old flesh are too tired to divide, and simply grow larger to take up the space left by dead cells. Other research suggests that most healthy cells never reach that limit for other factors.
Health requires the robust and harmonious functioning of many mechanisms.
We still know very little about how those systems function, let alone why they slowly degrade with age. Disodium EDTA, when administered intravenously, permeates all our tissues and tends to latch on to these calcium atoms in the mitochondria and remove them from the tissue, unjamming some of the mitochondrial energy mechanisms. If the treatment has plenty of magnesium in it, as Dr. Cathcart 's treatments do, then a magnesium atom will be preferentially left where the calcium was removed, further facilitating mitochondrial energization. There may be other effects, though it is hard to separate the C from the chelation in my personal experience. One of these effects may be inner cleansing.