An interesting study in Nature titled Genetic Polymorphisms in ADORA2A and CYP1A2 Influence Caffeine’s Effect on Postprandial Glycaemia (open access!) caught my eye. The study investigated how the genetic variants for caffeine metabolism interact with carbohydrate consumption.
Quick summary: Consuming caffeine along with carbohydrates changes glucose response for people with certain genetic variants - and doesn't change blood glucose levels for those without the variants.
A little background...
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