For Serotonin,: Tryptophan 1000 mg morning and 3pm. To make sure you get it, you can also take 5-HTP 100 mg instead. If you take any kind of SSRI or St-John’s Worth or anti-depressive, don’t try.
It has to be taken with 1000 mg of Tyrosine, at the same time.
For Dopamine, it’s L-Dopa (Mucuna Pruriens 95% extract) 375 mg, same time.
They have to be taken on empty stomach, all 3 at the same time. Start with lower doses, increase slowly, if it makes you feel bad, stop.
For GABA, if you don’t take any Anxyolitic medicine, you can try GABA supplements, or Taurine. Phenibut can be taken occasionally. Ashwagandha, Bacopa and Schisandra can be tried. Start with lower doses, increase slowly, if it makes you feel bad, stop. If you take Anxiolytic drugs, don’t try.