I don't think anyone is the same. MOAI's are not given with ssri's . 80% of serotonin is made in the stomache but it does not cross the blood brain barrier. SSRI's stop the release of serotonin at the synapse thus in theory leaving more serotonin at the right place onthe downside your brain only has so much and they have no way of measuring serotonin thats all I know. hope it helps