Caffeine is a stimulant made up of a chemical compound that is naturally found in a wide range of plants which are often used to produced coffee, tea, cocoa, and herbs such as guarana, yerba mate and even some medicines.
If you look online you will most likely find a wide array of articles stating the myths, benefits, facts and effects of caffeine, some being rather contradictory, while others actually have a thread of factual commonality. All of which really signify only one thing... the lack of studies on the matter, or at least any in depth studies that put forward any evidentiary facts on its conclusive effects.
The most common fact you will read are those that state a small amount of caffeine may have positive effects. It can increase alertness and help with concentration and naturally this is directed towards “healthy adults”.
However, to children and those people who are sensitive to caffeine or have underlying medical conditions, caffeine often disrupts sleep, causes headaches and makes them irritable and nervous. Researchers are now seriously looking into the potential adverse effects of caffeine, when consumed in high doses, on heart and bone health, behavioral patterns, cancers (risks) and infertility.
Below is a comparative list of products out there, which contain caffeine, that you may or may not consume on a daily basis.
Tea: (All content is per cup (8oz/250ml)
According to Health Canada & Dieticians of Canada, Canadians get about 60% of caffeine from coffee and 30% from tea. For kids, most caffeine comes from soft drinks. To protect health, Health Canada’s limits on caffeine intake: