In Sunday's New York Times Magazine, there's an extremely evocative article on life on the Greek island of Ikaria, pop. 10,000, whose "jagged ridge of scrub-covered mountains rises steeply out of the Aegean Sea." The focus is on the unusual longevity and good health of the people who live there. The author, National Geographic writer Dan Buettner, specializes in reporting on what he calls "blue zones"—pockets where populations manage to avoid succumbing to debilitating modern health scourges like Type 2 diabetes, heart disease, and cancer.
Buettner assembled a team of academic researchers to look hard at the island's demographics. They concluded that Ikarians are "reaching the age of 90 at two and a half times the rate Americans do." The situation for men is even more extreme: Ikarian men in particular are nearly four times as likely as their American counterparts to reach 90, often in better health. Buettner continues:
But more than that, Ikarians were also living about 8 to 10 years longer before succumbing to cancers and cardiovascular disease, and they suffered less depression and about a quarter the rate of dementia. Almost half of Americans 85 and older show signs of Alzheimer’s. (The Alzheimer's Association estimates that dementia cost Americans some $200 billion in 2012.) On Ikaria, however, people have been managing to stay sharp to the end.
Genetics can't explain the phenomenon, Buettner argues. On the next island over, he writes, people "with the same genetic background eat yogurt, drink wine, breathe the same air, fish from the same sea as their neighbors on Ikaria," but "live no longer than average Greeks." So, the obvious question here is, what are the Ikarians doing differently? The typical American impulse would be to identify some wonder substance driving the Ikarians' good health, concentrate it (if not synthesize it in a lab first), stick it in a pill, market it heavily—and then find out the wonder substance is all but worthless. We've learned that isolating nutrients, stripping away the context of their presence in whole foods, is not a recipe for health, as Michael Pollan showed in his In Defense of Food. Consuming beta carotene in the context of a carrot is good for you; gulping down a beta carotene pill, it turns out, not so much.