Quick Studies: A snapshot of the latest research on diet, exercise, and more

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Is apple juice or purée equal to an apple? Scientists had 18 adults consume, on three different days, 178 calories’ worth of apple slices, apple purée, or apple juice. The purée included the peel, so it had about as much fiber as the slices (7 grams). The juice had less (2 grams). We’re talking exercise, not food. When 11 adults with overweight or obesity spent 9 hours taking an hourly stair-climbing “snack”—which meant briskly climbing 55 steps—their blood insulin levels were 17 percent lower than when they spent 9 hours sitting. Each “snack” took 20 to 60 seconds. Unplanned weight loss and diabetes may be signs of pancreatic cancer. Could low blood levels of vitamin D raise the risk of Covid-19?