Serotonergic system

1. Neurotransmitter turnover vs. reuptake (Nootropic Key Ideas)
2. Serotonin precursors vs. serotonin reuptake inhibitors (Nootropic Key Ideas)
3. Sleep quality vs. sleep duration (Nootropic Key Ideas)
4. Dopaminergics vs. serotonergics (Nootropic Key Ideas)