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Sealed bottles of tattoo and permanent makeup ink, including some marked as sterile, contained millions of potentially dangerous bacteria, according to new research by the US Food and Drug Administration. (LaMotte, 7/18)

Two Canadians died from infections caused by listeria after drinking popular milk substitutes based on almonds, oats, cashews and coconuts that were sold under the Silk and Great Value brands, the country’s health department said Wednesday night. Another 10 infections, most of them affecting residents of Ontario, have been confirmed by laboratory tests, the department, Health Canada, said in its health notice. (Austen, 7/18)

Women in the United States face a growing number of threats to their health and well-being, a new report says, and there are vast disparities from state to state. (Howard and McPhillips, 7/18)

Earlier this month, the Biden administration announced a new rule that, if finalized, would become the first federal regulation specifically designed to protect workers from extreme heat both indoors and outdoors. It would trigger requirements for access to drinking water and rest breaks when the heat index reaches 80 degrees Fahrenheit. At 90 degrees, it would mandate 15-minute breaks every two hours and require employers to monitor for signs of heat illness. (Kutz, 7/17)

When it’s hot outside, your body keeps cool by sweating. But you don’t just lose water in the process: You also lose electrolytes like sodium, calcium and potassium that are crucial to keep your body functioning well. Sports drinks, hydration powders and tablets promise to help you replenish your electrolytes. But when do you actually need them, and are they the best source? “People always say ‘just drink Gatorade,’” said Dr. Elan Goldwaser, a sports medicine physician at NewYork-Presbyterian. “But the truth is, it’s so much more than that.” (Mogg, 7/17)

Women are likelier to die from breast and cervical cancer in a cluster of southern states where screenings and other preventive care lag behind the rest of the country. (Goldman, 7/18)

“Some studies show that some antioxidants, such as vitamins A, C, E and carotenoids and selenium, can help prevent some skin cancers,” says Dr. Tanya Nino, a double board-certified dermatologist and the melanoma program director at the Center for Cancer Prevention and Treatment at Providence St. Joseph Hospital in Burbank, California. “These vitamins are antioxidants that work by neutralizing free radicals in cells. Free radicals are unstable molecules that can damage the DNA in our cells.” (Maher, 7/18)

If you want to increase your odds of living a long and healthy life, watch less television and become more physically active, because even a small amount of physical activity can improve overall health, according to an observational study published last month in JAMA Network Open. While there have been many studies showing that moderate to vigorous physical activity is associated with healthy aging, researchers wanted to know if light physical activity compared with sedentary behaviors also improves healthy aging, and if not, how can people’s time be reallocated. (Chesler, 7/17)

Digging in sand might seem innocent, but if the hole is deep enough and collapses on a person, it is extremely difficult to escape. Research suggests more people die from sand burial suffocation than shark attacks. (Leatherman, 7/17)

As medical tourism becomes increasingly popular, Turkey has emerged as a destination of choice for balding American men seeking a cure to their receding hairlines. (Saric, 7/17)