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Water, L-carnitine, fructose, acidifier (citric acid), preservative (potassium sorbate), sweetener (sodium cyclamate, acesulfame K, sodium saccharin), natural flavor, vitamin B6 (pyridoxine hydrochloride)

Abbreviations BBB: Bloodbrain barrier CFS: Chronic fatigue syndrome CNS: Central nervous system CoA: Coenzyme A COVID-19: Coronavirus disease 2019 CrAT: Carnitine acetyltransferase CRP: C-reactive protein HPA: Hypothalamicpituitaryadrenal IDO: Indoleamine 2,3-dioxygenase IL-2: Interleukin-2 IMD: Immunometabolic depression MDD: Major depressive disorder ME: Myalgic encephalomyelitis mGluR2: Metabotropic glutamate receptor 2 MS: Multiple sclerosis NMDA: N -Methyl-d-aspartate NMR: Nuclear magnetic resonance Nrf2: Nuclear factor erythroid 2-related factor 2 OCTN2: Organic cation novel type 2 transporter OCT1: Organic cation transporter 1 PAIS: Post-acute infection syndromes PASC: Post-acute sequelae of SARS-CoV-2 infection PDC: Pyruvate dehydrogenase complex PGD2S: Prostaglandin D2 synthase gene QUIN: Quinolinic acid ROS: Reactive oxygen species Trp: Tryptophan TCA: Tricarboxylic acid HO-1: Heme oxygenase 1 PUFAs: Polyunsaturated fatty acids CACT: Carnitine-acylcarnitine translocase MRI: Magnetic resonance imaging [ 18 F]FDG-PET/CT: [ 18 F]Fluorodeoxyglucose positron emission tomography/computed tomography References Abraham NG, Kappas A (2008) Pharmacological and clinical aspects of heme oxygenase

However, oral supplementation of these nutrients produces similar biochemical outcomes as injection, and most people consume adequate amounts through diet