Autism researchers at Texas A&M University say they have discovered that a common food supplement could help offset a genetic mutation linked to the complex disorder. Carnitine, which is available as an over-the-counter nutritional supplement and is found in red meats and whole milk, could play a key role in preventing some forms of autism from developing during the early days of pregnancy. There's not a consensus on whether pregnant women should supplement their carnitine intake, but the A&M researchers see it as a step with virtually no downside if done under medical supervision.

Charlie Sheen boosted health awareness

Actor Charlie Sheen's revelation that he is HIV-positive prompted the greatest number of HIV-related Google searches recorded in the United States since 2004, and more than 1 million of them involved public health-related information. That's according to a study from San Diego State University research professor John Ayers and colleagues. "While no one should be forced to reveal HIV status, Sheen's disclosure may benefit public health by helping many people learn more about HIV infection and prevention," the researchers wrote in a report published in JAMA Internal Medicine.

43% of black gay men will get HIV

About 43 percent of black gay men will get an HIV diagnosis in their lifetimes if the current trends hold, said research by the Centers for Disease Control and Prevention. For Hispanic gay men, the rate is 22 percent. For white gay men, it's about 10 percent. The report is a staggering reminder that gay men of color bear the brunt of the HIV crisis.

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