Serotonin
It is a substance found in the blood, the brain, certain tumors, the clam, the octopus, jellyfish and nettles. Discovered only 10 years ago, it is presently a frontier of physiological research
It is a substance found in the blood, the brain, certain tumors, the clam, the octopus, jellyfish and nettles. Discovered only 10 years ago, it is presently a frontier of physiological research