https://www.consumerreports.org/health/caffeine/caffeine-in-coffee-a2519854957/
These figures are higher than I expected. Roughly 15 years ago I read that a large McDonalds coffee had 180 mg of caffeine, and the small had half of that. I have been using these figures for large and small coffees ever since. However, the article lists a large McDonalds coffee at 295 mg and the Dunkin Donuts large coffee is the same.
The values for instant coffee are more than I expected. I had read figures under 100 mg. I don't like the taste of instant coffee.
The trouble with calculating the content of home brewed coffee is that it depends upon how much coffee you use. The labels recommend using more than I actually use.
I twice quit caffeine by phasing it out very slowly. However, I enjoy drinking my 50% decaf in the morning. I like how it gives me a boost. I study chess in the morning, and the coffee gets my brain going.
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