John Yudkin

John Yudkin (1910–1995) was a British physiologist and nutritionist who argued that high sugar consumption contributes to heart disease and other health problems.

Ancel Keys: Ancel Keys was an American physiologist who promoted the diet–heart hypothesis linking saturated fat to coronary heart disease. Keys’s focus on dietary fat became the main rival to Yudkin’s emphasis on sugar.
Fructose: Fructose is a simple sugar found naturally in fruit and as a component of sucrose. Yudkin particularly suspected fructose as a driver of harmful metabolic changes.
Diet–heart hypothesis: The diet–heart hypothesis links dietary saturated fat and cholesterol to elevated blood cholesterol and coronary disease. It offered a competing explanation for heart disease that put dietary fat, not sugar, at the center.
Pure, White and Deadly: Pure, White and Deadly is John Yudkin’s 1972 book warning that sugar consumption contributes to chronic disease. The book made his critique of sugar accessible beyond scientific debate.
Robert Lustig: Robert Lustig is an American pediatric endocrinologist known for arguing that fructose contributes to metabolic disease. Lustig later revived public arguments about sugar’s health effects that Yudkin had advanced.
De novo lipogenesis: De novo lipogenesis is the process by which the body converts excess carbohydrate into fatty acids. This pathway offers a mechanism connecting high sugar intake with increased blood lipids.
Seven Countries Study: The Seven Countries Study was a long-term epidemiological study of diet, lifestyle, and cardiovascular disease led by Ancel Keys. Its findings supported Keys’s emphasis on fat and contrasted with Yudkin’s interpretation of dietary risk.
Sugar tax: A sugar tax is a levy on sugary drinks or foods intended to reduce consumption or raise public revenue. Public-health proposals to tax sugary drinks echo Yudkin’s concern about excess intake.
Frederick Stare: Frederick Stare was an American nutritionist who founded Harvard’s nutrition department and defended sugar as part of a balanced diet. Stare publicly opposed Yudkin’s warnings about sugar.
Triglyceride: Triglycerides are fats in blood that store energy and can contribute to cardiovascular risk when elevated. Yudkin linked sugar consumption to higher circulating triglycerides.

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