The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
the paper that I think is really spectacular is a paper, last author is Quaresma, Q-U-A-R-E-S-M-A. That's Q-U-A-R-E-S-M-A. It's a review. "The Possible Importance of Glutamine Supplementation to Mood and Cognition in Hypoxia from High Altitude". And even though paper is about high altitude-induced hypoxia, it does seem to have direct relevance to the sorts of apnea that are related to Alzheimer's and other forms of cognitive decline.
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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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it does appear that glutamine supplementation can offset some of the cognitive deficits that are associated with reduced oxygenation of the brain.
So how is it that glutamine, either from food or through supplementation, can offset some of these so-called hypoxic effects caused by sleep apnea? Hypoxia being a lack of oxygen for the brain that relate to cognitive decline. It appears to have this positive impact by way of reducing inflammation.