This study by Richardson, et al, was done to test the relationship between blood levels of tetrahydrobiopterin (BH4) and schizophrenia. BH4 is a vital chemical cofactor necessary for the body for making the following neurotransmitters: Dopamine (DA.) Noradrenaline (NA.) Serotonin (5-HT.) Nitric oxide (NO.) Glutaminergic system stimulation. Phenylalanine blood levels were also tested because phenylalanine […]
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