D-phenylalanine (enkephalinase inhibitor)
Interesting substance, its one of the few dextro (right-spinning optical isomer) amino acids that you can process or something.
I think its fascinating because its purportedly an endorphin reuptake enkephalinase inhibitor? or something so its potentially quasi-opioidergic. I’m not sold on the notion its legit but its definitely a provocative idea.
Tryptophan. It is a biochemical precursor for important neurotransmitters, vitamins and hormones such as melatonin, serotonin, and niacin. There happens to be very high concentrations of it in milk and eggs, both of which I love a lot. It can have sedating effects and make you feel chilled out!