Low-carb diets will be among the eating styles reviewed for the 2020 update of U.S. dietary guidelines.

Low-carb diets have become increasingly popular in the United States and supporters of this style of eating say its inclusion in the guidelines could affect government school programs like school lunches and influence nutrition advice given by doctors, the Associated Press reported.

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Current examples of healthy eating cited by the guidelines include the Mediterranean diet and vegetarian options.

The panel reviewing the guidelines held its first meeting last week and is expected to issue a report by next year, the AP reported.

Despite the popularity of low-carb diets, some nutrition experts note that evidence for the diets is new and that possible long-term effects are unclear.

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