Tetrahydrobiopterin is a naturally occurring essential cofactor of the three aromatic amino acid hydroxylase enzymes, used in the degradation of amino acid phenylalanine and in the biosynthesis of the neurotransmitters serotonin (5-hydroxytryptamine, 5-HT), melatonin, dopamine, norepinephrine (noradrenaline),epinephrine (adrenaline), and is a cofactor for the production of nitric oxide (NO) by the nitric oxide synthases.

Pack size: 60 capsules

(other) sucrose, gelatin, L-leucine.

Store in a cool, dark place out of reach of children

Food supplements should not be used as a substitute for a varied diet. If you are taking prescribed medication, have any medical condition, or are pregnant or breastfeeding, please consult your healthcare practitioner before taking food supplements.