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Autism Coach

BH4 - Biopterin


BH4 - Biopterin

0.25 LBS
Calculated at checkout

Product Description

3/8/17 - Order it While You Can - Hard to Source and Frequently Out of Stock

BH4, Biopterin, may be a critical nutrient for individuals within the autism spectrum.  BH4 is naturally produced by the body and has been shown to be 42% lower in the cerbro spinal fluid of children diagnosed with autism.* 

Biopterin is depleted in the body by the man-made chemical, glyphosate, the active ingredient in the the weed killer, Roundup, that contaminates most of the U.S. food supply.  Millions of tons of Roundup have been sprayed on agricultural fields since genetically modified (GMO) crops were introduced in 2000.  Virtually every person in the United States is contaminated with glyphosate in their body.  The increase in the incidence of autism directly correlates to the introduction and increase of glyphosate into the food supply. (5)

What is BH4 and what does it do?  It is a molecule that activates (initiates a chemical reaction) for important metabolic processes in the body:

  • converts the amino acid phenylalanine into the amino acid tyrosoine - too much phenyalanine can cause a form of brain damage called phenylketonuria; phenyalanine levels tend to be high in autism
  • converts the amino tryptophan into the active form 5-hydroxytryptophan (5-HTP), a molecule that is used to produce the neurotransmitters serotonin (for alertness and good mood) and melatonin (promotes sleep)
  • converts tyrosine to the neurotransmitter L-DOPA, L-DOPA is needed to make the neurotransmitters norepinephrine and epinephrine
  • converts the amino acid arginine to nitric oxide (NO); nitric oxide helps to dialate blood vessesls allowing oxygen and nutrients to reach cells more efficiently; not enough nitric oxide can cause neurovascular disease, including contributing to circulation diseases like diabetes





BH4 is not only is involved in the formation of neurotransmitters, but also involved in heart, and endothelial dysfunction, the immune response, and pain sensitivity, forming lipids (membranes), and recycling and making folate, methylfolate, and SAMe, all critical for neurological function and detoxification.

An initial study done with autism by Dr. Frye indicated it helped some individuals with autism. (1)

The importance of BH4 was not lost on a Swiss pharmaceutical company, who somehow manged to obtain a monopoly on it and an affordable product incredibily expensive and difficult to obtain.  Because of this, this product is expensive to make and frequently out of stock (the last time it was out of stock for over a year).  If you do order it, store it in the freezer to extend the shelf life.  It is very expensive for us to obtain it but we offer $10 off the suggested retail price.

Lack of BH4 bioavailability can lead to the development of impaired NO-mediated microvascular function in a wide variety of conditions, including diabetes, hypertension, hypercholesterolemia, atherosclerosis, and aging.  Nitric oxide synthases (NOS) needs BH4 for the production of nitric oxide. When there is low BH4 concentration, NOS generates superoxide instead of NO, which increases oxidative stress and causes endothelial dysfunction.  Oxidative stress  can contribute to many complications, such as heart disease, high cholesterol, diabetes, high blood pressure, and stroke. Supplementation with BH4 may restore BH4 concentrations and prevent these diseases.  Infusion of BH4 could restore the heart conditions in patients with high cholesterol, type II diabetes, congestive heart failure and heart disease.

Depression is associated with an inflammatory response as well as activation of the anti-inflammatory reflex system. It is also accompanied by oxidative and nitrosative stress (2).

Elevated levels of inflammation and oxidative damage can subsequently lead to a depletion of tetrahydrobiopterin levels (2, 3).

The depletion of BH4 reduces the synthesis of neurotransmitters that compounds are essential for controlling daily body functions including mood, sleep cycle, memory, and appetite (2).  Loss of BH4 might explain some of the symptoms of depression. If BH4 levels increased, then it can be an effective treatment for depression (2).

Diabetes is characterized by glucose intolerance and insulin resistance, which can be caused by endothelial nitric oxide synthase (eNOS) dysfunction. Diabetes can also cause gastroparesis, and its symptoms include pain, nausea, and vomiting (2,3).  BH4 helps regulate eNOS activity and prevents it from dysfunction. Administration of BH4 in mice lead to less glucose intolerance and insuline resistance; it has potential to help alleviate symptoms of diabetes (2, 3).

There are various genes that when mutated can cause lower BH4.  These include:

  • Defects in the MTHFR gene
  • Defects in the DHFR gene
  • Defects in the GCH1 gene
  • Defects in the SPR gene

In addition to taking BH4 directly the following can help to increase levels of BH4 in the body:

  • Exercise
  • SAM-e
  • Folate/Methyl folate (by scavening peroxynitrite and increasing recycling) (2)
  • Vitamin C (1, 3)


1.  RE Frey et al., Neurotherapeutics.  2010 July; 7(3):  241-249






 * The statements made in this description have not been evaluated by the Food and Drug Administration.  This product is not intended to diagnose, treat, cure or prevent any disease.

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