In addition, the physiological effects of caffeine intake include acute elevation of blood pressure, increasing metabolic rate, and diuresis. Based on the data reviewed, it can be concluded that moderate caffeine intake (2–3 cups or 300mg/day) is not associated with adverse effects, such as cardiovascular stimulatory effects and behavioral changes, at least in healthy adults.4 However, caffeine is not completely harmless. In fact, caffeine crosses the human placenta, rapidly reaching a similar concentration in the fetus and mother. The excessive intake of caffeine has been implicated as a cause of spontaneous abortion or impaired fetal growth.3 Caffeine intake for women who plan to
become pregnant and for women during gestation should not
exceed 300mg/day. In a variety of studies for caffeine ingestion,
children can be defined as another risk group because
altered behavior including nervousness or anxiety is found.3
It is judged that an intake of 2.5mg/kg body weight/day is
an upper limit of caffeine consumption in children (Federal
Department of Health, Ottawa, Ontario, Canada).
In addition, the physiological effects of caffeine intake include acute elevation of blood pressure, increasing metabolic rate, and diuresis. Based on the data reviewed, it can be concluded that moderate caffeine intake (2–3 cups or 300mg/day) is not associated with adverse effects, such as cardiovascular stimulatory effects and behavioral changes, at least in healthy adults.4 However, caffeine is not completely harmless. In fact, caffeine crosses the human placenta, rapidly reaching a similar concentration in the fetus and mother. The excessive intake of caffeine has been implicated as a cause of spontaneous abortion or impaired fetal growth.3 Caffeine intake for women who plan tobecome pregnant and for women during gestation should notexceed 300mg/day. In a variety of studies for caffeine ingestion,children can be defined as another risk group becausealtered behavior including nervousness or anxiety is found.3It is judged that an intake of 2.5mg/kg body weight/day isan upper limit of caffeine consumption in children (FederalDepartment of Health, Ottawa, Ontario, Canada).
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