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Tetrahydrobiopterin deficiency (THBD, BH 4 D) is a rare metabolic disorder that increases the blood levels of phenylalanine.Phenylalanine is an amino acid obtained normally through the diet, but can be harmful if excess levels build up, causing intellectual disability and other serious health problems.
Phenethylamine is sold as a dietary supplement for purported mood and weight loss-related therapeutic benefits; however, in orally ingested phenethylamine, a significant amount is metabolized in the small intestine by monoamine oxidase B (MAO-B) and then aldehyde dehydrogenase (ALDH), which converts it to phenylacetic acid. [5]
Certain supplement ingredients may be dangerous “Many supplements have complicated names, and some potentially dangerous ingredients are listed under names that make them seem like safer ...
[39] [231] [184] [232] [233] L-Phenylalanine is known to be metabolized into β-phenethylamine, selegiline is known to strongly inhibit the metabolism of β-phenethylamine, and β-phenethylamine has been implicated in having psychostimulant-like mood-lifting effects.
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l-DOPA is produced from the amino acid l-tyrosine by the enzyme tyrosine hydroxylase. l-DOPA can act as an l-tyrosine mimetic and be incorporated into proteins by mammalian cells in place of l-tyrosine, generating protease-resistant and aggregate-prone proteins in vitro and may contribute to neurotoxicity with chronic l-DOPA administration. [10]
Over half of Americans take at least one supplement, according to the CDC. But Michael Pollan, who has taught a MasterClass on intentional eating, written multiple food-related books, and released ...
D-Phenylalanine (DPA, D-Phe), sold under the brand names Deprenon, Sabiben, and Sabiden, is an enantiomer of phenylalanine which is described as an antidepressant and is marketed as a prescription drug for medical use in Argentina. [1] [2] The medication has been marketed since at least the 1970s [3] and continued to be available by the 2000s. [1]