Pteridin-4 (2.5mg) – 60 capsules (formerly known as BH4)

Pteridin-4 contains important enzyme co-factors that are naturally present in a number of foods, including mammalian breast milk and royal jelly. This product is free of soy, yeast, gluten and other common allergens. The added ammonia that is generated due to the enhanced breakdown of methylation cycle intermediates will also burden the adjoining urea cycle, thereby depleting a key intermediate called BH4, which plays a critical role in regulating neurotransmitters and therefore mood. BH4 is needed for serotonin, dopamine, conversion of phenylalanine to tyrosine and language-related function. The A1298C mutation in the MTHFR gene may also impact levels of BH4.