Are personalized diets ready for prime time?

(WebMD) — When Howard Wolinsky was diagnosed with type 2 diabetes, he expected to kiss bagels goodbye — too many carbs. But a personalized diet based on his own gut microbiome offered a pleasant surprise: “It turns out those little bugs in my guts seem to like bread, if it’s combined with fats and proteins,” he says.

Wolinsky’s diet came from DayTwo, a company that uses research from the Weizmann Institute of Science in Israel to create customized advice for people with diabetes. From his home in suburban Chicago, Wolinsky, 71, sent the company a stool sample and a completed questionnaire, and he got back guidance about precisely which foods would spike his blood glucose and which would keep it steady. He was also taking an oral medication for his diabetes.

“I could have a bagel, with cream cheese and lox,” he says. “That combination got a really good rating on the DayTwo scale.” He was amazed to find that when he followed DayTwo’s advice, his blood sugar remained within a normal range. It didn’t spike the way it would for foods outside their recommendations. (…)

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