CarboFix :-: To send motivations, these phones require synthetic compounds called synapses (neuro = nerve) to be available in the fluid encompassing the phones. The synapses (dopamine, norepinephirene, and serotonin) are produced using tyrosine and trytophan, amino acids (parts of proteins) discovered plentifully in protein food varieties. Tyrosine is the main fixing in dopamine and norepinephrine, the "sharpness" synapses. (This clarifies why a high protein supper causes you to feel ready and enthusiastic) trytophan is the main fixing in serotonin, the "quieting" synapse.