Tetrahydrobiopterin (also known as THB or BH4) is a naturally occurring nutrient and essential cofactor of the three aromatic amino acid hydroxylase enzymes.
Sapropterin is a specific form of tetrahydrobiopterin that is sold under a variety of brand names including Kuvan. It helps to activate phenylalanine hydroxylase, the enzyme that breaks down phenylalanine in the body.
This glossary is designed to explain some of the jargon and gobbledygook used by some people when they talk about autism or research..
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