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Caffine restricts blood flow to the brain?

I had seen a live study on YT. A doctor showed the news person how her brain blood flow was before morning coffee and then moments (enough time for it to get into the system) that it reduced blood flow to the brain by 40%. is this accurate? If so, could taking something like vinpocetine help counter the effect?

Blood work - explained

Hi Would you consider doing an episode on routine bloodwork? I would like to understand the various things that are being tested and what to do if a number is considered elevated. Thank you!

using pattern recognition during your working memory test

last episode during the first working memory test, I remembered the first two sequences without a problem. However, I used pattern recognition instead of straight out memorizing them... can people who are good at detecting patterns, visualize images/movement, mapping the patterns to schemas in there head instead memorization during this working memory test actually prove they have good working memory? it seems like my working memory just passed the info to another part of the brain and moved on... jkzpi - jk was the middle of the keyboard i put my index finger to type, z the last letter in alphabet, pi - math symbol romkle - read only memory, my friend kyle without the y i learned and used three very different languages (turkish/english/german) at different times (and spoke a mixture of them in sentences at home and school) and always had to look for patterns to learn things... not sure the working test memory actually shows my dopamine level or whether i have a good working memory. in reality my language is "math/equations (science/engineering)/image-movement visualization/patterns/process mapping" and less spoken words...

Fibromyalgia, epilepsy, endometriosis

I would love a few episodes about fibromyalgia as I’ve seen my mom suffer her whole life, I would love to know more also about epilepsy as my father and brother also suffer from that. How alcohol makes epilepsy worse, (my father is a functioning alcoholic) and I would love an episode about endometriosis.

How to stop hot flashes

What could be a purpose behind hot flashes and how do we get rid of the ones that result from menopause without hormone replacement therapy. Thanks!