GROWN-UP PROBLEMS The cells that keep this body running are doing their best, but there’s only so much they can do against the abuse of an unhealthy lifestyle. A simple case of athlete’s foot is one thing, but a flood of caustic acid caused by a stomach ulcer is enough to make any cell think about a career change. It turns out that there’s only so much these hard-working cells can handle before the consequences turn as serious as a heart attack…