To follow a strict diet to lose weight, particularly one based on the historical 'Banting diet' popular in the 1800s.
From William Banting, a 19th-century undertaker who popularized a low-carbohydrate diet in his 1863 pamphlet 'Letter on Corpulence.' His name became a verb meaning to diet.
Banting was basically the Victorian version of keto—one guy lost weight cutting carbs and sugar, wrote about it, and started a whole diet movement that lasted decades.
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