carnitine or acetyl l carnitine Nutricost L-Carnitine Powder (ALCAR) 500G, 1000mg Per Serving NOW Foods Supplements, Acetyl-L Carnitine

6.3 The kynurenine pathway: an interactive mechanism linking gut microbiota, immunity, and neurotransmitters Specific neurotransmitters, such as GABA, dopamine, glutamate, and serotonin (5-HT), are derived from precursors tyrosine and tryptophan, which are transported across the BBB into the CNS and subsequently converted into neurotransmitters (213)

The co-existence of hyperzincaemia (high zinc in serum) and hypocupraemia (low copper in serum) is suggestive of ZICD [154]

Glutathione Plus Tablets: Each tablet contains 500 mg of pure Glutathione (reduced), Vitamin C, Biotin, and L-Lysine

3.2 Cellular therapy 3.2.1 Neuregulin1 With the development of stem cell research, the use of neural stem cells (NSCs) in the treatment of diseases is now of great interest