CHK Nutrition sells neurotransmitter support products to clinics. We do not deal with or give advice to anyone who does not have a medical license. These products include NeuroReplete, RepleteExtra, D5, D5 Extra, TyrosineReplete, D5 Mucuna, 99%+ pure 5-HTP, and CysReplete.

  CHK Nutrition started by selling 5-HTP (5HTP or L-5-HTP) tyrosine, and L-dopa (mucuna source, not faba bean source) formulas to medical clinics who were having trouble finding consistent quality in the products they were buying in local stores. Some clinics were experiencing problems with 5-HTP (5HTP or L-5-HTP) obtained in local stores. In some cases 90% of the 5-HTP (5HTP or L-5-HTP) products bought in local stores did not work in clinical applications.

  Other concerns that arose from clinics attempting to obtain properly balanced 5-HTP (5HTP or L-5-HTP), tyrosine, and L-dopa (mucuna, not faba bean sourced). The problem being if only 5-HTP or improperly balanced 5-HTP is given it will deplete of dopamine. On the other hand if only tyrosine and/or L-dopa is taken or improperly balanced tyrosine and/or L-dopa is taken it will deplete of serotonin.

  The peer reviewed medical literature found on this web site (see the "neurotransmitter chemistry" link) is clear, using only 5-HTP or L-dopa depletes dopamine and serotonin respectively. When the depletion is severe enough any effects seen with the use of only 5-HTP or L-dopa will quit. Yet every day caregivers use only 5-HTP and L-dopa or people taken these things on their own take only 5-HTP, L-dopa, or tyrosine never realizing the problems associated with doing so. The key is taking proper amounts of 5-HTP in combination with L-tyrosine (not N-acetyl-tyrosine) and L-dopa so that optimal results are obtained and depletion of serotonin or dopamine is prevented.

DISCLAIMER: The nutritional supplement products sold by CHK are nutritional supplements intended to provide support for neurotransmitters. These statements have not been evaluated by the Food and Drug Administration (FDA). These products are not intended to diagnose, treat, cure, or prevent any disease.

CHK Nutrition only sells to, deals with, and gives assistance to licensed health care providers. We do not give advice, assistance or sell to the general public. If you have a health care related question please contact your licensed health care provider.