For more than a decade, doctors have known that some compound in grapefruit juice interacts with a small number of drugs to triple the amount of that drug absorbed into the bloodstream.

It’s a disease that is universally fatal; there is no cure at present; and one out of 10 people over 65 will be diagnosed with it. It already affects millions of Americans at the cost of billions, and as baby boomers swell the ranks of the elderly, it could potentially break our health care system. But it has yet to be recognized as a national health priority.

Whenever you open a newspaper or magazine these days, you’re likely to find an article exhorting baby boomers to plan for retirement—telling them to save more, to learn about portfolio planning, and to project their financial needs for decades to come.