serotonin – happiness, relaxation, and satiety These sterling silver earrings are inspired by the shape of the serotonin molecule, a neurotransmitter that induce feelings of happiness, satiation, and relaxation. They are good for days when you might need a little happiness boost. The solid sterling silver charms are about 1 inch long and hang on solid sterling silver French wires. The earrings come in a recycled gift box with a tag about serotonin.Made With Molecules offers original, handmade, high quality jewelry by scientist-turned-artist Raven Hanna, PhD. MWM uses Earth-friendly and people-friendly practices in a solar-powered sugarcane shack on the flank of Kilauea volcano. A percentage of profits are donated to environmental and science education nonprofit organizations. See other molecular jewelry offerings in my shop. Thank you!