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3min chapter
How to Stop Headaches Using Science-Based Approaches
Huberman Lab
Can Caffeine Help With Headaches?
Caffeine has the ability to impinge on the so-called NO pathway, the nitric oxide pathway. This is a nerve to blood pathway that causes dilation of the blood vessels. If you haven't slept well or it's late in the day and you've been up for a long time, drinking caffeine is likely to have more of a vasoconstriction effect. Even if you can fall asleep after drinking caffeine, ingesting caffeine within the 10 to 12 hours prior to bedtime is simply not a good idea.
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