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Coffee contains caffiene.
During this times, the highest cortisol level rises, which makes it the most effective time to drink caffiene.
The Declaration • February 3, 2020 • https://thedeclarationatcoloniahigh.com/45682/fun-factofthe-day/coffee-is-most-effective-if-consumed-between-930-am-and-1130-am/
Coffee is most effective if consumed between 9:30 am and 11:30 am