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26 , 151525 e4 (2019)
Last reviewed: May 28, 2026 Last updated: May 28, 2026 Written by: Jay Hastings, CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations
While KYN itself is not neuroactive, it is a branching point for two major metabolic routes: one leading to the synthesis of kynurenic acid (KYNA), which occurs in astrocytes, and another leading to the synthesis of picolinic acid (PA) and quinolinic acid (QA), occurring in microglia, with QA serving as a precursor for nicotinamide adenine dinucleotide (NAD) [25, 26]
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