Caffeine intake and its sources: A review of national representative studies

Figures & data

Figure 1. PRISMA Flow Diagram.

Table 1. Overview of main findings of caffeine intakes (mg/day) from different age groups as reported by selected studies.

	Country/region
	USA												New Zealand
Age group			Female	Male			Canada	Europe		UK	Austria	Australia	Female	Male	South Korea
all	164.5	186	149.8		131.9	240.7
infants	23.7		6.9	8.4		43.5	7	0.3–30.3	23.35			3.4			1.4
children	36.6							3.5–47.1		45		8.1–19.2			4.4–7.5
adolescents	83.2		46.6	69.5	62–74.9	103.4–110.5		17.6–69.5	149.20	85		41.7	77	75	10.1–30.0
adults	122.1–225.5	121–215	82.2–225.3	133.4–295.6	161.9	300.7		36.5–319.4	271.7	122–143	357		144–252	194–264	66.2–101.8
elderly	207.3	152	120.8	156.9				21.8–416.8					179	216	44.8–56-5
Method	7-day beverage diary	24-hour recall	24-hour recall		14-day diary	various		various	various		Food Frequency Questionnaire				24-hour recall
Year	2010–2011	2001–2010	2005–2006		2008		2001	1997–2012	2012	2008–2010	2011	2007	2008–2009		2010–2012
Reference	Mitchell et al. 2014	Instutute of Medicine2014	Somogyi 2010				Knight et al. 2006	EFSA 2015	Zucconi et al. 2013	Fitt et al. 2013	Rudolph et al.2014	FSANZ 2015	FRC 2013		Lim et al. 2015

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