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The World Health Organization (WHO) released updated guidelines and evidence-based recommendations to help people reduce their risk of cognitive decline and dementia. The guidelines apply to adults with normal cognition or mild cognitive impairment. They are intended primarily for healthcare providers, though they may help policymakers to support population-level interventions, the WHO said. (George, 7/20)

Spouses of people with dementia had a higher risk of developing dementia themselves, a matched cohort study of nearly 1 million married people in Taiwan showed. (George, 7/20)

The number of former servicemembers enrolled in the Department of Veterans Affairs system who have had traumatic brain injuries spiked considerably in the last four years on record, new data from the department shows. (Donnelly, 7/20)

Only about 1 in 10 people in their 30s (11%) are recommended statins under the new guidelines, rising to 85% of people in their 60s and 94% of those in their 70s, the study showed. The people newly eligible for statins under the updated recommendations tend to have low short-term risk but higher long-term risk, researchers said. They have a less than 3% chance of heart attack or stroke within 10 years, but more than 10% within 30 years. (Thompson, 7/21)

Diet is one of the most important factors shaping health, but it’s surprisingly difficult for researchers to figure out what people eat. Researchers’ usual tools, like food frequency questionnaires or asking people to recall what they ate the day before, are tedious and expensive, said Christopher Gardner, a nutrition scientist at Stanford. Such efforts depend on people being candid and accurate; people forget about 15 to 20 percent of what they ate after a few days. (Bajaj, 7/20)

It’s easy to miss the cannabis beverages that line the refrigerated sections of grocery stores, bodegas, and delis throughout New York City. The rainbow-like array of cans — bearing names such as Oasis, Cann, Milonga, Cycling Frog, Tempter’s, Gigli, and Mighty Kind — often look indistinguishable from iced tea, probiotic sodas, and other wellness-coded “functional beverages” that share their shelf space. (Todd, 7/21)

An Australian woman gave birth last week to naturally conceived identical quadruplet girls who shared one placenta after splitting from one fertilized egg, in what doctors described as an extremely rare event. The woman, Jenitar Sau Na’amoana, 34, and her husband Jortham, have four children aged from 1 to 10, and had not planned on having any more, the Royal Brisbane and Women’s Hospital, where she gave birth, said in a statement on Monday. They were surprised to find they had naturally conceived the quadruplets, the hospital said. And the surprises kept coming. (Chung, 7/21)