Glycaemic index slammed as “unreliable”

US researchers have called for the glycaemic index (GI) to be abandoned as a guide to food choices after their study showed substantial fluctuations in blood sugar responses by individuals.

Around 63 normoglycaemic adults underwent six testing sessions over 12 weeks, where they were randomly allocated to consume white bread with a mean GI value of 62, or a glucose drink that served as a reference control. Both options included 50g of carbohydrates.

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