Biotype Nutrients is a source for nutritional supplements to help persons with mood and behavior disorders choose nutrients that best match their biochemical 'biotype.'  If for instance, it has been determined that one who is depressed is an 'overmethylator,' then the preferred supplements for this can be found in that category. If depression is associated with undermethylation or copper overload or even pyroluria, then the most likely choices recommended by your physician can be found in these sections.


It is important to know your 'biotype' is because that tells if you is functioning with elevated or reduced serotonin and dopamine activitym or if you have elevated norepinephrine. By reviewing the labs included in a 'Walsh Panel' your doctor can determine your biotype and zero in on which supplements are necessary for treating the metabolic condition contributing to your mmod disorder, whether that be oxidative stress, nutrient imbalance or an issue with methylation.


At Biotype Nutrients, supplements are organized by the major health 'biotypes' or biochemical characteristics that are theorized to be associated with the majority persons mental health condition. This website selects and categorizes nutrients selection according to Walsh Biotypes, as well as other related conditions. Supplements are selected for their professional quality and ingredients in order that they fit solidly within the Biotype category where they belong.


'Biotypes' are classifications of biochemistry as it relates to key nutrients that may be influencing mood and behavior disorders. According to Dr Walsh of the Walsh Research Institute, there are 5 major 'Biotypes of Depression'. A specific lab test panel is used to determine one's biotype. When reviewed by a Walsh trained practitioner, patients are given a clear understanding of the key factors contributing to their condition and a plan for supplementation to correct any excesses or deficiencies.

Walsh Biotypes of Depression
Biotypes of Depression. Walsh Research Institute


The science behind brain disorders is growing exponentially every year. Our understanding is always changing. And there are different theories and protocols that doctors ascribe to in their individual approaches to treating mood disorders. 

This site is recommended for persons who wish to utilize the protocol developed by researchers from the Walsh Institute. It is is based on a lab test and history taking to determine a clear understanding of your biotype.  With that information it is possible to predict with a high degree of accuracy a person's serotonin and dopamine activity level. Because these supplements may be taken to eithe rincrease or decrease serotonin and dopamine, etc, what's good for the goose may not be good for the gander.

Please be advised, not all practitioners view the role of methylation and folic acid the same as do practitioners of the Walsh method. In fact the tests used to determine methylation status are not always the same.

So, when using this site, proceed with caution. That's the reason we classify the supplements according to the biotypes; to help persons who know their biotype, to find supplements that are most specifically suited for their needs.

Nutrients Assorted by Walsh Biotypes

Assorted by General Type

Other Assortments

General Disclamer

Biotype Nutrients is strictly a supplements website and is not affiliated with the Walsh Research Institute. This is merely a resource for practitioners and patients for sourcing nutrients in the management of mood and behavior disorders. See FDA disclaimer here...

Patients, looking for a practitioner?

There are many licensed physicians and psychiatrists trained to treat mood disorders and help optimize cognitive performance with nutrients.  If you are interested in practitioners certified in the Walsh Protocol, or learning more about this theory find out more here.

Practitioners, would you like to become an affiliate?

Doctors trained to utilize nutrients per Biotypes, may enjoy this website to help their patients make the best selection. Affiliate rewards program is available that will entitle you to discounted Assessment Reports, supplement margins and other perks.

Undermethylation is a scientific term used describe a condition whereby the body has a reduced 'methylating' activity. In simple terms, the effect of methylation is to up-regulate or down-regulate the DNA transcription activity of each cell line. Transcription makes proteins and each cell type produces a different protein. Proteins from teh various cells include hormones, enzymes, immune globulins, and nutrient transporters. 

There are different theories in the diagnosis as well as the treatment of 'undermethylation.' If you are practicing or being supplemented according to the Walsh Protocol you will have likely had a whole blood histamine test vs a DNA MTHFR genetic test. Here you will find supplements here that are most suitable for undermethylators.

Unlike other protocols you won't find folic acid, niacin, DMAE or choline on this page. These supplements are discouraged within the Walsh Protocol as they lower the activity of serotonin and dopamine neurotransmitters.


Allergy Research Group

L-Methionine 500 mg 100 Capsules





Allergy Research Group

Pyridoxine P5P 60 cap 275 mg



Zinc 30 180 Capsules


Jarrow Formulas

5-HTP 100 mg 60 Capsules


Biotype Nutrients

Is a supplements store developed for patients of Second Opinion Physician which recommends supplements according to ones Biotype.  This site is now available to practitioners and patients who are educated about their Biotype and the proper use of supplements for improving mood and behavior disorders.

Biotype Nutrients
P.O. Box 5236
Atlanta, GA 31107


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FDA Disclaimer

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease. Supplements offered on this site should be taken under the guidance of a trained physician. Read more...