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2. 5-Hydroxytryptophan - Wikipedia

   en.wikipedia.org/wiki/5-Hydroxytryptophan

   5-HTP is produced from the amino acid tryptophan through the action of the enzyme tryptophan hydroxylase. Tryptophan hydroxylase is one of the biopterin-dependent aromatic amino acid hydroxylases. Production of 5-HTP is the rate-limiting step in 5-HT (serotonin) synthesis. 5-HTP is normally rapidly converted to 5-HT by amino acid decarboxylase. [1]

3. Serotonin - Wikipedia

   en.wikipedia.org/wiki/Serotonin

   Serotonin (/ ˌ s ɛr ə ˈ t oʊ n ɪ n, ˌ s ɪər ə-/) [6] [7] [8] or 5-hydroxytryptamine (5-HT) is a monoamine neurotransmitter.Its biological function is complex, touching on diverse functions including mood, cognition, reward, learning, memory, and numerous physiological processes such as vomiting and vasoconstriction.

4. 5-HT receptor - Wikipedia

   en.wikipedia.org/wiki/5-HT_receptor

   5-HT receptors, 5-hydroxytryptamine receptors, or serotonin receptors, are a group of G protein-coupled receptor and ligand-gated ion channels found in the central and peripheral nervous systems. [ 1 ] [ 2 ] [ 3 ] They mediate both excitatory and inhibitory neurotransmission .

5. 30 of the Best Brain Supplements for Adults - AOL

   www.aol.com/entertainment/30-best-brain...

   Raw Science 5-HTP Focus & Memory Supplement. ... but many users have reported positive results from taking this supplement. ... a neurotransmitter that plays significant roles in mood regulation ...

6. Management of depression - Wikipedia

   en.wikipedia.org/wiki/Management_of_depression

   [135] 5-HTP and tryptophan are sold over the counter in North America, but requires a prescription in Europe. The use of 5-HTP instead of tryptophan bypasses the conversion of tryptophan into 5-HTP by the enzyme tryptophan hydroxylase , which is the rate-limiting step in the synthesis of serotonin, and 5-HTP easily crosses the blood–brain ...

7. Tryptophan hydroxylase - Wikipedia

   en.wikipedia.org/wiki/Tryptophan_hydroxylase

   Tryptophan hydroxylase (TPH) is an enzyme (EC 1.14.16.4) involved in the synthesis of the monoamine neurotransmitter serotonin. Tyrosine hydroxylase, phenylalanine hydroxylase, and tryptophan hydroxylase together constitute the family of biopterin-dependent aromatic amino acid hydroxylases.