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


The Pteridin-4 is currently out of stock and backordered at the manufacturer until January sometime. If you would like to be placed on our list to be notified when more arrive please email us. Please write BH4 in the subject line. Thank you.

Out of stock