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Q&A 449: The Best Caffeine Alternatives (& Things That Make Coffee Work Even Better), Why You Need A "Skin Callus", Flawed Red Meat Study, 4 Keys To Happiness & Much More!
Ben Greenfield Life
Is Caffeine a Performance Enhancement Aid?
The theory that predominate for a while was that caffeine blocks the receptors that detect the presence of a dentacy, which is the molecule associated with fatigue as it builds up in the brain. And then this newer study is actually suggesting that there's an additional factor and that's related to oxygen levels in your blood. But then what they also found was that caffeine was allowing for a really significant amount of oxygen to be flowing into the arteries of these folks who were on coffee.
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