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By Lindsey Tanner The Associated Press

Mind-altering breast milk? New pot study poses that question

CHICAGO — Marijuana’s main mind-altering ingredient was detected in nursing mothers’ breast milk in a small study that comes amid evidence that more U.S. women are using pot during pregnancy and afterward.

Experts say the ingredient, THC, has chemical properties that could allow it to disrupt brain development and potentially cause harm, although solid evidence of that is lacking.

Fresh grounds for coffee: Study shows it may boost longevity

CHICAGO — Go ahead and have that cup of coffee, maybe even several more. New research shows it may boost chances for a longer life, even for those who down at least eight cups daily.

In a study of nearly half-a-million British adults, coffee drinkers had a slightly lower risk of death over 10 years than abstainers.

Marijuana’s 4/20 holiday tied to rise in fatal car crashes

CHICAGO — Marijuana users’ self-proclaimed holiday is linked with a slight increase in fatal U.S. car crashes, an analysis of 25 years of data found.

The study lacks evidence on whether pot was involved in any of the April 20 crashes, but marijuana can impair driving ability. Previous studies have shown that many pot-using motorists drive after partaking and think it’s safe to do so.

Rise in teen suicide, social media coincide; is there link?

CHICAGO — An increase in suicide rates among U.S. teens occurred at the same time social media use surged and a new analysis suggests there may be a link.

Suicide rates for teens rose between 2010 and 2015 after they had declined for nearly two decades, according to data from the federal Centers for Disease Control and Prevention. Why the rates went up isn’t known.

Trump calls attackers ‘deranged’ but mental health link weak

CHICAGO — President Donald Trump called the Texas church shootings gunman “deranged,” the New York bike path attacker “a very sick and deranged person,” and the Las Vegas massacre shooter “a sick, demented man.”

It’s a common reaction to mass violence who in their right mind would commit these senseless crimes? The truth is more nuanced.

Brain disease seen in most football players in large report

CHICAGO — Research on 202 former football players found evidence of a brain disease linked to repeated head blows in nearly all of them, from athletes in the CFL, NFL, college and even high school.

It’s the largest update on chronic traumatic encephalopathy, or CTE, a debilitating brain disease that can cause a range of symptoms including memory loss.