Tyrosine is a precursor to Dopamine as said, which itself is a precursor to Adrenaline and Noradrenaline (Catecholamines). It's also good to take as a pre-workout supplement.
5-HTP is a precursor to Serotonin and Melatonin which maybe why you are having more vivid dreams.
5-HTP is a precursor to Serotonin and Melatonin which maybe why you are having more vivid dreams.