Trends and patterns of caffeine consumption among US teenagers and young adults, NHANES 2003-2012.
Caffeine consumption among US teenagers (13-17y), young adults (18-24y) and adults (25-29y) for a 10 year period was examined using NHANES 2003-12. Of the 85% who consume caffeine 84% consume caffeinated beverages. This percentage remained constant despite new caffeine sources. Less than 7.1% of the population consume energy drinks. While mean caffeine intake among teenage caffeine consumers decreased from 62 to 55 mg/day (p-value = 0.018) over the 10-year period, no discernable trend was observed for other age groups. Caffeine intake from energy drinks increased, and was only statistically significant for age 18-24y accounting for <9% of total caffeine intake. Mean caffeine intake per consumption occasion was equivalent between coffee and energy drinks for teenagers and young adults. During a 30-min period mean caffeine consumption was similar when an energy drink was the only consumption event or when it occurred with other caffeinated beverage products suggestive of a substitution effect. Linear regression models of caffeine intake from energy drinks against caffeine from coffee, tea and soda among energy drink consumers in the upper 50th percentile shows a statistically significant inverse relationship (R2 = 28%, coffee: β = -0.35, p < 0.001; tea: β = -0.44, p < 0.001; soda: β = -0.22, p = 0.036) and further supports the substitution concept.
Exponent, Inc., United States. Electronic address: ntran@exponent.com.
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Exponent, Inc., United States.
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Barraj
Exponent, Inc., United States.
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American Beverage Association, United States.
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D000293:Adolescent; D000328:Adult; D001628:Beverages; D002110:Caffeine / Q000008:administration & dosage*; D006801:Humans; D009749:Nutrition Surveys; D014481:United States; D055815:Young Adult
D002110:Caffeine
2-Day average; 30-Minute elapsed time; Caffeine intake; Consumption occasion; Energy drink; Trends