guidelines regarding appropriate levels of caffeine. In addition to coffee, caffeine is present in a variety of substances, including tea, chocolate and some carbonated beverages. Therefore, it is important for consumers to look at all sources of caffeine when assessing their intake levels.
Following are the Health Canada guidelines offered for children, women of childbearing age, and all other adults:

For children age 12 and under, maximum daily caffeine intake of no more than 2.5 milligrams per kilogram of body weight is suggested. Based on average body weights, 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; and85 mg for children aged 10 – 12 . These recommended maximums are equivalent to about one to two 12-oz (355 ml) cans of cola a day.

For women of childbearing age, recommendations suggest a maximum daily caffeine intake of no more than 300 mg which is the equivalent of a little more than two 8-oz (237 ml) cups of coffee.

For all other adults, Health Canada suggests a daily intake of no more than 400-450 mg or about three to four 8-oz (237 ml) cups of coffee.