Serotonin necklace H | sterling silver Serotonin (5-hydroxytryptamine) is the neurotransmitter that runs the moods of mood, the gut motility of digestion, and the platelet-aggregation switch of the bloodstream all from the same simple indole structure. The horizontal layout of the molecule reads as a quieter, more wearable version of the more familiar vertical pendant. The Chemistry of Serotonin Serotonin is a monoamine neurotransmitter synthesised from tryptophan via 5-hydroxytryptophan (5-HTP), with the rate-limiting step catalysed by tryptophan hydroxylase. About 90% of the body's serotonin is in the gut, where enterochromaffin cells regulate motility and secretion. The remaining 10% in the central nervous system arises mostly from the raphe nuclei in the brainstem, projecting widely to cortex, limbic system, and spinal cord. Modern psychiatry depends on the serotonin system: SSRIs (fluoxetine, sertraline, escitalopram), SNRIs, MAOIs, triptans for migraine (5-HT1B/1D agonists), 5-HT3 antagonists for chemo-induced nausea, atypical antipsychotics with 5-HT2A activity. The molecule is small, the receptor diversity is enormous (14 known subtypes), and the clinical reach extends from depression to nausea to migraine to autism research. Worn By The audience clusters around neuroscience and psychiatry: psychiatrists and clinical psychologists neuroscientists studying mood, anxiety, or reward circuits pharmacologists working on serotonergic drugs gastroenterologists studying gut motility and the enteric nervous system medical students and residents through psychiatry rotations Often picked by partners or family of working psychiatrists and psychopharmacologists, with the horizontal layout chosen as the quieter daily-wear version of the vertical pendant. Explore Related Molecules Jewelry Serotonin necklace V | silver Dopamine-serotonin necklace | silver Dopamine necklace | silver FAQ What is the difference between the horizontal and vertical serotonin pendants? Layout and chain attachment. The H version sits horizontally on the chest, with the molecule reading left to right. The V version sits vertically, reading top to bottom. Same molecule, same chemistry, same nickel-free silver. Most buyers pick H as the quieter daily-wear option and V as the more pendant-style statement piece. Why is gut serotonin so much higher than brain serotonin? Because most serotonin in the body is not about mood, it is about digestion. Enterochromaffin cells in the gut epithelium produce 90% of total body serotonin, regulating motility, secretion, and the vomiting reflex. The blood-brain barrier prevents this gut serotonin from reaching the central nervous system, which is why eating tryptophan-rich food does not directly raise brain serotonin. The two pools (gut and brain) operate independently. Most serotonergic drugs target receptor subtypes that are expressed in one or the other, allowing relatively selective action. What is the size, material, and chain? 26 mm pendant in 925 sterling silver, nickel-free. 45 cm sterling silver chain with a 5 cm extender. Ships free worldwide via DHL Express in 1-5 business days, with all import duties prepaid. Comes in a ready-to-gift jewelry box with the 30-day “Love It or Return It” policy. Is there a gold version? Yes, in the vertical layout. The horizontal serotonin is silver only for now. The catalog has gold versions of dopamine, dopamine-serotonin, and the vertical serotonin if a paired silver-gold gift in neuroscience is the goal.
