I remember reading that during a fast the body will eat up scar tissue for fuel before it eats up healthy cells. That doesn't sound right, but I know for fact that my scar tissue in my lungs was _DRASTICALLY_ cleared up while on the MC. The pain and stiffness (scar tissue) lessened, I could breathe deeper and easier. Hard to explain the benefits & the dramatic difference, but let me just say that it was completely physically noticeable by me.
I'm hoping to do another chest xray soon to see if the scarring has visibly lessened... & once I get to do my 40-day MC, then I'll have another chest xray post MC. That'll be irrefutable evidence of fasting clearing up lung scar tissue. But I'll have to wait a bit to start the Master-Cleanse again.