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Cephalalgia 40(6):575585 Gruenbaum BF, Kutz R, Zlotnik A, Boyko M (2020) Blood glutamate scavenging as a novel glutamate-based therapeutic approach for post-stroke depression

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A test to check for the ideal 'acid to base' ratio to minimize irritation caused by the injection itself

Instead, it's part of the ascorbyl glucoside blend, used to help keep it stable and in the ideal pH range prior to being added to a cosmetic formula