Organic Cation Transporters Type 2 (OCT-2) are responsible for moving neurotransmitters like serotonin and dopamine in and out of cells.  This test determines the optimal function of these transporters in order to adjust the dosing of neurotransmitter precursors to obtain optimal health.  This is a urine test analyzed by DBS labs and is only done with the use of RND therapy.

Baseline testing of neurotransmitters is of no value.  That is, doing a urine test before taking any nutrients is a waste of money.  These types of tests are not reproducible and they do not reflect the amount of circulating neurotransmitters in the body and brain because these monoamines (serotonin and dopamine) do not cross the blood brain barrier.

This particular urine neurotransmitter test from DBS labs does not evaluate the absolute levels of serotonin and dopamine in the body as high or low or normal to fall within a specific set value range.  This test indirectly measures the serotonin and dopamine in the body and brain by evaluating OCT-2 transporters when challenged with neurotransmitter precursor nutrients.  Therefore, this test does not determine if you are "high" or "low" or "normal", it is only to help determine proper dosing while on RND therapy.

Before doing this test, all prescribed amino acids and nutrient cofactors must be taken exactly as prescribed without missing any doses for at least 5 - 7 days.  This will help achieve accurate evaluation with follow-up recommendations.