Caffeine supplement8/11/2023 The antioxidant abilities of caffeine also nurture our brain.* Regulating oxidative balance 10, after all, is essential for supporting healthy nerve cells and brain function. This temporarily prevents adenosine from attaching to said receptors, helping you feel more wakeful and alert.* However, caffeine has a similar structure to adenosine-so much so that it can swoop in and bind to adenosine receptors.* It's a natural "antagonist" (turns out to be a useful thing) of the receptor. Your levels of adenosine naturally increase the longer you're awake and drop while you snooze at night. When it binds to specific receptors, adenosine slows down neural activity and makes you sleepy. In the body, caffeine sources like espresso and coffee stimulate your CNS (i.e., your brain and spinal cord) primarily by blocking adenosine receptors 2, according to Isa Kujawski, MPH, RDN, registered dietitian nutritionist and founder of Mea Nutrition.*Ī quick explainer: Adenosine is a neurotransmitter, aka a chemical messenger secreted by nerve cells (neurons). Caffeine is a unique phytonutrient compound (or sometimes, a synthetic substance, depending on the source) that stimulates the central nervous system (CNS).* As a plant nutrient (aka phyto + nutrient), it's naturally found in more than 60 plants 1, including coffee berries, coffee beans, tea leaves, guarana seeds, and cacao beans (i.e., chocolate).
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