| Besides its role in hair and iris pigmentation, tyrosine is also a dopamine, noradrenalin and adrenalin precursor. |
| The catecholamines adrenalin, noradrenalin and dopamine are synthesized in the adrenal medulla, the sympathetic nervous system and in the brain. |
| In addition, in animals treated with Peptidea®, the rate of transport of adrenalin and noradrenalin was slower. |
| Other well-known examples such as noradrenalin, serotonin and glutamate then gradually followed. |
| Chromaffin cells are potentially capable of releasing very small quantities of dopamine, a precursor to noradrenalin. |
| The released noradrenalin then stimulates the receptors of the sympathetic nervous system. |
