Table 2.

Mean daily caffeine intakes (mg/day) among users of caffeine-containing energy products in the National Health and Nutrition Examination Survey, 2007–2010

Sex and age group	No. surveyed	Mean intake (SE)a
Total	300	159.8 (6.4)
9–13 years	15	181.8 (60.1)
14–18 years	41	141.2 (16.5)
19–30 years	91	161.4 (11.1)
31–50 years	117	165.2 (12.9)
51–70 years	33	154.3 (12.8)
Male	212	173.9 (8.2)
9–13 years	13	196.6 (72.4)
14–18 years	25	153.3 (14.7)
19–30 years	64	175.3 (15.0)
31–50 years	86	180.7 (13.5)
51–70 years	22	158.4 (17.6)
Female	88	127.6 (11.5)
14–18 years	16	119.5 (40.5)
19–30 years	27	134.9 (16.5)
31–50 years	31	114.6 (21.4)
51–70 years	11	148.2 (21.1)

^aVery small sample sizes exist for population subgroups and inferences drawn from this data should be limited to the data with genders combined. Subgroups with very small sample sizes (n < 10) are omitted. These estimates do not include caffeine from foods and beverages that are not marketed as dietary supplement.