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Caffeinated is a compendium of facts, interesting stories, and history about one of our favorite unregulated drugs - caffeine. Murray Carpenter writes about caffeine's physiologic effects (on adenosine receptors), why people metabolize caffeine at different rates (because of genetic predisposition, smoking, or other medications), and that there is no standard amount of caffeine in a cup of coffee or tea. He recounts his trips to Guatemalan coffee farms, Mexican cacao farms, and a synthetic caffeine factory in China. He covers caffeine research by the military, the beneficial and problematic aspects of caffeine use by athletes, and the many regulatory difficulties surrounding caffeine in foods, beverages, and supplements. The marketing of caffeine in sodas and energy drinks by “Big Beverage” is one of the most important sections of the book, sounding suspiciously like nicotine marketing by tobacco companies.
The exhaustive research presented in Caffeinated is both a strength and a weakness. I'm a person who loves to see a good argument supported by relevant data and details, but there were quite a few times that the numbers presented by Carpenter became simply overwhelming. I'm also a person that can admit that there are many mornings where the only thing that gets me out of bed is the lovely anticipation of my morning cup of tea and how good it's going to make me feel. Caffeinated doesn't judge whether my dependence on that cup of tea is good, bad, or otherwise, but it does make the reader think about caffeine - not just coffee, tea, or soda - in all its myriad presentations.
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Good information to consider. I don't think we've heard the whole story yet. More to come, I'm sure.