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The Boston Globe

Health & wellness

Daily Dose

Cause of obesity epidemic remains elusive

In the two decades since obesity was declared a nationwide epidemic, researchers have been struggling to determine why 36 percent of American adults are now obese compared with fewer than 15 percent in 1990. With the growing list of health problems linked to obesity — including the fact that severely obese individuals may lose up to 14 years of life according to a study published last week — the race to find answers has never been more urgent.

Unfortunately, it sometimes seems like researchers are running in place.

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