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fad diet
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Assorted ketogenic diet foods on a dark tray, including salmon fillets, eggs, avocado, various cheeses, nuts, seeds, spinach, broccoli, and a bowl of nut butter. Assortment of protein-rich foods on a wooden table, including salmon, beef, chicken breast, eggs, milk, cheese, beans, and almonds.
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Assorted ketogenic diet foods on a dark tray, including salmon fillets, eggs, avocado, various cheeses, nuts, seeds, spinach, broccoli, and a bowl of nut butter.
Typical ketogenic diet foods The ketogenic diet restricts carbohydrates to promote fat metabolism through ketosis. It is typically focused on the consumption of meats, eggs, cheese, nuts, oils, and low-carbohydrate vegetables.

fad diet

nutrition
Written by
Kara Rogers
Kara Rogers is the senior editor of biomedical sciences at Encyclopædia Britannica, where she oversees a range of content from medicine and genetics to microorganisms. She joined Britannica in 2006 and...
Kara Rogers
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Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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fad diet, any of various eating plans that promote rapid weight loss or other health benefits through highly restrictive, unconventional, or narrowly focused dietary practices. Typically characterized by claims of quick and dramatic results, fad diets often eliminate entire food groups, emphasize specific “superfoods,” or rely on simplified interpretations of nutrition science. Although some may produce short-term weight loss, many lack rigorous scientific support and may be nutritionally imbalanced or difficult to sustain. The recurring...

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