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Testosterone may lower heart attack risk in older men: study

Older men with clogged arteries who took testosterone therapy seemed to have a lower risk of heart attacks than men who did not take the hormone, a study suggested Sunday. Testosterone is currently considered risky to the heart, and the US Food and Drug Administration mandated last year that manufacturers of all approved testosterone products add labels to describe these dangers, which include heart attack and stroke. The methods of the study were observational — one of the weakest kinds of scientific research — but its authors said the results should lead to more rigorous trials on the hormone therapy in the future.

Late delay as Pacific trade talks near landmark deal

U.S. officials, who are hosting the meeting, delayed a planned joint news conference until early Monday. On Saturday, Amari had said the next 24 hours would be a make-or-break period for the talks. After five years of negotiations, many officials had described this round as the best chance for an agreement, so failure to strike a deal in Atlanta would plunge the future of the talks into uncertainty.

Daily pot smoking on U.S. college campuses at 35-year high: study

The number of U.S. college students smoking marijuana every day or nearly every day is greater than it has been in 35 years, according to a study released on Tuesday. Nearly 6 percent of college students reported using pot daily or near-daily in 2014, up from 3.5 percent in 2007 but less than the 7.2 percent recorded in 1980, the University of Michigan's Monitoring the Future study found. “It's clear that for the past seven or eight years there has been an increase in marijuana use among the nation's college students,” said Lloyd Johnston, the study's principal author.