[Correspondence] Dietary guidelines are not beyond criticism

Mann and colleagues (Aug 27, p 851)1 claim that criticisms of the dietary guidelines are not evidence-based. However, even by their own account, the promotion of reduced-fat dairy products in existing guidelines is not evidence-based, in view of the lack of association of dairy fat with cardiovascular risk, and the strong protective associations that exist between ruminant fatty acids and type 2 diabetes.2 This evidence contradicts the theory that the effect of dietary saturated fat on serum cholesterol is the cause of the association between serum cholesterol and cardiovascular disease.

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