Sources of Caffeine in Diets of US Children and Adults: Trends by Beverage Type and Purchase Location.

Nutrients · 2016 · PMC4808882 · PMID 26978391

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a decreasing trendno p-value reported

Among children overall, there was evidence of a decreasing trend, with average caffeine intakes decreasing from 51.8 mg/day in 1999–2000 to 35.3 mg/day in 2011–2012 ( p -trend = 0.01).

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