Peter D'Adamo Pantethine:
Cysteamine blocks conversion of dopamine to noradrenaline due to its actions on dopamine beta hydroxylase. Works better in group O individuals.
http://en.wikipedia.org/wiki/CysteamineCysteamine - Wikipedia, the free encyclopedia
en.wikipedia.org
Cysteamine is the chemical compound with the formula HSCH2CH2NH2.
http://en.wikipedia.org/wiki/Cysteamine