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People who practice a type of intermittent fasting called time-restricted eating, specifically those who only ingest calories during an 8-hour window each day, may nearly double the risk of dying from cardiovascular disease compared to people with , according to preliminary research presented this week at the American Heart Association conference in Chicago.

These findings “surprised us,” said lead study author Victor Wenze Zhong, Ph.D., professor and chair of the Department of Epidemiology and Biostatistics at Shanghai Jiao Tong University School of Medicine in Shanghai, China, in a press release. Says.

The results are certainly attention-grabbing. However, it is important to note that this was an observational study, so although time-restricted eating was not found to cause cardiovascular death, there is an association.

Dr. Christopher D. Gardner, a professor of medicine at Stanford University in California and a leading nutrition researcher who was not involved in the study, said there are additional caveats that cast doubt on the study’s findings. There is.

For example, Dr. Gardner wondered: What types of food did people in the study eat? The analysis has not yet been published in a peer-reviewed medical journal, so key details are not yet available.

“I think the concept of time-restricted diets in general is problematic because it keeps the focus on when the food is being consumed rather than the quality of what is being consumed,” Gardner says. . “As a nutritionist, I’m more concerned with the quality of what people eat.”

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