L-tyrosine is an amino acid that functions as a precursor for stimulating neurotransmitters like norepinephrine and dopamine. It is often used to recover from drugs like cocaine and amphetamines. It may also be used to recover from serotonergic drugs like MDMA, but in that case the user must first replenish serotonine levels by using l-tryptophan. Ingesting l-tyrosine when serotonine is still depleted could have neurotoxic effects. * Usage Take 1 capsule a day on an empty stomach with fruit juice (sugars help transportation through the blood-brain barrier). To recover from the use of cocaine or amphetamines, take one capsule before going to sleep, and another one upon awakening. To recover from the use of MDMA, first take l-tryptophan before going to sleep and take a combination of l-tryptophan and l-tyrosine the next morning. Ingredients 1 capsule contains: 500 mg l-tyrosine 10 mg vitamin B6 (Pyridoxine HCL) Warning Do not use in combination with MAO inhibitors. Not to be used by persons who have been treated or are being treated for malign melanoma.