Treating depression with tyrosine and tryptophan
Common antidepressants work by increasing the activity of serotonin and noradrenaline receptors in the brain.
There are also so-called nutritional supplements (= natural substances that do not require a prescription) that increase the level of the neurotransmitters noradrenaline and serotonin, thus achieving exactly the same effect as prescription antidepressants. In pharmacies or fitness stores, you can buy so-called precursors of these substances. A precursor means a chemically almost identical substance to serotonin and noradrenaline, which is later converted into serotonin and noradrenaline in the body by biosynthesis.
https://en.wikipedia.org/wiki/Tyrosine
https://en.wikipedia.org/wiki/Tyrosine
https://en.wikipedia.org/wiki/Tyrosine
http://www.namaximum.sk/kategoria/aminokyseliny/tyrosine-l-tyrozin/
https://en.wikipedia.org/wiki/Phenylalanine
https://en.wikipedia.org/wiki/Phenylalanine
https://en.wikipedia.org/wiki/Phenylalanine
https://www.magister.sk/produkt/detail/produkty-od-a-po-z/tryptofan-b-60cps/
https://www.drmax.sk/revital-premium-l-tryptofan-forte/
https://www.mojalekaren.sk/brainway-l-tryptofan-50-10-kapsli/
It is better and more practical to buy directly at the pharmacy than online.