I just rechecked and although the recommendations are 400mg caffeine for the average person,
for women of childbearing age, the new recommendation is a maximum daily caffeine intake of no more than 300 mg. That's the equivalent of only one grande Starbucks brewed coffee.
For children age 12 and under, Health Canada recommends a maximum daily caffeine intake of no more than 2.5 milligrams per kilogram of body weight. Based on average body weights of children, this means a daily caffeine intake of no more than:
45 mg for children aged 4 - 6;
62.5 mg for children aged 7 - 9; and
85 mg for children aged 10 - 12.
Those recommended maximums are equivalent to about one to two 12-oz (355 ml) cans of cola a day.