While I also still firmly believe its best to obtain your micronutrients from food, I dont reject supplementation (even synthetics) for short term use or until normal levels are restored
Inhibition of TRAF3IP2 Modulates NAMPT and NAD Metabolism in Glioblastoma [PMID: 41123804] Laboratory literature summary: Inhibition of TRAF3IP2 Modulates NAMPT and NAD Metabolism in Glioblastoma
Thats how probiotics are today
Name GHK-Cu (Glycine-Histidine-Lysine) Concentration 5mg per vial Form Lyophilized peptide powder Purity 99%, confirmed by HPLC and MS Packaging Sterile, sealed vial Storage -20C in a dark, dry environment Tested For Identity, purity, and contaminants (third-party verified) GHK-Cu is a naturally occurring copper-binding tripeptide (Glycine-Histidine-Lysine) first isolated from human plasma
Secondary carnitine depletion due to increased formation and urinary excretion of glutarylcarnitine is suggested to play an important role in the neuropathogenesis of GCDH deficiency, inducing excitotoxic neuronal damage and mitochondrial dysfunction [83]