Explore our database of over 10000 laboratory markers.

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Immune System

Reference range:   Negative, Abnormal

Immunofixation electrophoresis or immunosubtraction capillary electrophoresis identifies the type of immunoglobulin protein(s) present as monoclonal bands on a protein electrophoresis pattern. Typically, this testing determines the presence and type of monoclonal proteins (e.g., IgG kappa).

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Immune System

Optimal range:   87 - 352 mg/dL , 0.87 - 3.52 g/L

Immunoglobulin A (IgA), one of the five primary immunoglobulins, plays a pivotal role in mucosal homeostasis in the gastrointestinal, respiratory, and genitourinary tracts, functioning as the dominant antibody of immunity in this role.

Total IgA (Immunoglobulin A), expressed in milligrams per deciliter (mg/dL), is a crucial marker in clinical immunology representing the predominant immunoglobulin class in mucosal secretions and the second most abundant immunoglobulin in serum. This glycoprotein plays a pivotal role in mucosal immunity, offering a primary line of defense against pathogens at mucosal surfaces, including the gastrointestinal, respiratory, and genitourinary tracts. Normal levels of Total IgA in the blood vary based on age and individual health conditions but typically range from 70 to 400 mg/dL in adults.

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Immune System

Optimal range:   0 - 14.11 mg/dL

Immunoglobulin D (IgD) is an antibody isotype that makes up about 1% of proteins in the plasma membranes of immature B-lymphocytes where it is usually coexpressed with another cell surface antibody called IgM.

Remains in the bloodstream to fight bacteria. Functions mainly as an antigen receptor on B cells that have not been exposed to antigens. It has been shown to activate basophils and mast cells to produce antimicrobial factors.

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Immune System

Optimal range:   0 - 114 kU/L

Immunoglobulin E (IgE) is a key antibody in the immune system, crucial for diagnosing and managing allergies. Testing for IgE is important for identifying specific allergens causing allergic reactions, which can range from mild symptoms like sneezing to severe, potentially life-threatening conditions like anaphylaxis. Measuring IgE levels helps in creating personalized treatment plans, including medication and immunotherapy. It's also used to monitor the effectiveness of allergy treatments and assess the severity of chronic conditions like asthma. Elevated IgE levels can indicate broader immune system issues, making it a valuable tool in immunological assessments. With allergies becoming more common, IgE testing is increasingly important in healthcare, aiding in better patient care in allergy and immunology.

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Allergens w/ Total IgE Area 2, Labcorp: What It Is, What It Tests, and How to Get Your Lab Results

Optimal range:   6 - 495 IU/ml

In the blood of healthy people, IgE antibodies make up less than 0.001% of all immunoglobulins. These IgE antibodies are key in triggering allergic responses when people sensitive to allergens come into contact with them.

Structurally, IgE resembles other antibodies, having two light chains and two heavy chains. The heavy chains have a special region that determines the antibody's specificity to antigens. Measuring IgE levels is clinically significant mainly because of its role in allergic reactions, even though IgE myeloma is a very rare condition.

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Immune System

Optimal range:   6 - 495 IU/ml

Immunoglobulin E (IgE) are antibodies produced by the immune system. 

IgE antibodies are found in the lungs, skin, and mucous membranes. They cause the body to react against foreign substances such as pollen, fungus spores, and animal dander. They are also involved in allergic reactions to milk, some medicines, and some poisons.

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Immune System

Optimal range:   586 - 1602 mg/dL , 5.86 - 16.02 g/L

Total IgG adds all of your IgG together and reports it as a concentration. That makes it a useful measure of how much antibody protein is present, and a poor one for answering where it came from or what it is aimed at. A broad reactive increase and a single abnormal plasma-cell clone can produce the same number, and the test cannot separate them. A low result raises the opposite question — whether enough antibody is being made, or whether it is being lost or suppressed — and is read alongside IgA and IgM rather than alone. Both directions are interpreted against intervals that differ by age and by sex.

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Quest Diagnostics, Quest Diagnostics

Optimal range:   50 - 300 mg/dL

Immunoglobulin M (IgM), which is found mainly in the blood and lymph fluid, is the first antibody to be made by the body to fight a new infection. Expressed on the surface of B cells (monomer) and in a secreted form (pentamer) with very high avidity (forms multiple binding sites with antigen). Eliminates pathogens in the early stages of B-cell mediated (humoral) immunity before there is sufficient IgG. 

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Immune System

Optimal range:   26 - 217 mg/dL , 0.26 - 2.17 g/L

Total IgM adds all of your IgM together and reports it as a concentration. That makes it a measure of how much IgM protein is present, and a poor guide to where it came from. IgM is produced early when the body meets something new, so a raised total can reflect a broad immune response — but it can also reflect an abnormal cell line, and the number alone cannot distinguish the two. A low result raises the opposite question — whether enough antibody is being made, or whether it is being lost or suppressed — and is read alongside IgG and IgA rather than alone. Both directions are interpreted against intervals that differ by age and, for IgM, substantially by sex.

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Quest Diagnostics, Quest Diagnostics

Optimal range:   4 - 86 mg/dL

IgG immunoglobulins are composed of four subtypes named IgG1, IgG2, IgG3 and IgG4. Each subclass is present in the serum in different concentrations, varies with age, and has different roles for immune response. Abnormal levels of one or more subclasses may be associated with certain conditions.

This marker helps to evaluate sinopulmonary infections, asthma; immunotherapy hyposensitization; and allergies.

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Organix Comprehensive Profile - Urine, Genova Diagnostics

Optimal range:   0 - 90 mcg/mg creatinine

Indican is an indole produced when bacteria in the intestine act on the amino acid, tryptophan. Most indoles are excreted in the feces. The remainder is absorbed, metabolized by the liver, and excreted as indicanin the urine.

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Nutritional Organic Acids (Urine) - DUTCH, Precision Analytical Laboratory – DUTCH Test Interpretation Guide

Optimal range:   0 - 100 ug/mg

Indican is an indole produced when bacteria in the intestine act on the amino acid, tryptophan. Most indoles are excreted in the feces.

The remainder is absorbed, metabolized by the liver, and excreted as indicanin the urine.

Accumulated levels of Indican in the urine may suggest gastrointestinal dysbiosis or malabsorption.

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Nutritional Organic Acids (Urine) - DUTCH, Precision Analytical Laboratory – DUTCH Test Interpretation Guide

Optimal range:   0 - 131 ug/mg

Indican is a byproduct of tryptophan putrefaction by microbes in the gut. Accumulated levels of indican in the urine suggest higher levels of tryptophan putrefaction from gastrointestinal dysbiosis or malabsorption.

Production of indican occurs when tryptophan creates indoles in the colon. No other endogenous indoles are metabolized in this way, so when we see indican in the urine, it is directly related to gut production and a direct reflection of gut health. When there is concern of dysbiosis, there may be poor metabolism of sex hormones (including estrogen) along with chronic low-grade inflammation that can impact cortisol production and metabolism.

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BiomeFx, Microbiome Labs

Optimal range:   2.45 - 13.43 Healthy Relative Abundance IQR (%)

Indole is a byproduct of the microbial degradation of tryptophan that can be utilized in a variety of ways in the gut microbiome. Indole can bind to serotonin receptors in order to regulate behavior, gut motility, and food intake, and it can support immune and intestinal health by interacting with gut microbes, scavenging free radicals, and increasing the expression of xenobiotic-metabolizing enzymes like cytochrome P450. Indole also functions as a signaling molecule that may be increased during latent infections. Indole production must be balanced, as too much indole may produce unwanted changes in mood or cognition, yet insufficient indole production may damage the gut barrier.

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3301 Organix Comprehensive Profile - Urine (mmol/mol creatinine), Genova Diagnostics

Optimal range:   0 - 4.2 mmol/mol creatinine

Indoleacetic acid (IAA), or indole-3-acetate, is produced by the bacterial fermentation of the amino acid tryptophan.

IAA can be formed from several common gut microbes such as Clostridia species, Escherichia coli, and Saccharomyces species.

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3200 Metabolomix+ - FMV Urine, Genova Diagnostics

Optimal range:   0 - 4.2 mmol/mol creatinine

Indoleacetic acid (IAA), or indole-3-acetate, is produced by the bacterial fermentation of the amino acid tryptophan.

IAA can be formed from several common gut microbes such as Clostridia species, Escherichia coli, and Saccharomyces species.

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OMX Organic Metabolomics / Diagnostic Solutions, Diagnostic Solutions Laboratory | GI-MAP & Food Sensitivity Tests

Optimal range:   3 - 55.5 nmol/mg Creatinine

- A product of tryptophan fermentation. If elevated, decrease protein intake and address digestion and GI issues. Bacteroides, Clostridia, and E. coli ferment tryptophan to produced indoleacetic acid.

- It has been found elevated in liver disease, ASD, and cancer, and has been noted as a marker of microbial activity.

- Indoleacetic acid can be degraded by Bacillus subtilis, or Pseudomonas aeruginosa.

- Indoleacetic acid has been found in many foods, such as lettuce, cherry tomato, Chinese bayberry, and okra.

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Metabolic Analysis Markers (Urine)

Optimal range:   0 - 4.2 mmol/mol creatinine

Produced from bacterial degradation of unabsorbed tryptophan.

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2200 GI Effects Comprehensive Profile - Stool, Genova Diagnostics

Optimal range:   0 - 2 Score

Biomarkers:

- Parasitic Infection Pathogenic and potentially pathogenic parasites i.e., Cryptosporidium, Giardia, Entamoeba histolytica, all others)

- Pathogenic Bacteria (Clostridium difficile toxin, Helicobacter pylori, Campylobacter spp., Shiga toxin E. coli)

- PP Bacteria/Yeast (Known Pathogen i.e., Salmonella, Aeromonas, all others)

- Total Abundance: The total commensal abundance is a sum-total of the reported commensal bacteria compared to a healthy cohort. Low levels of commensal bacteria are often observed after antimicrobial therapy, or in diets lacking fiber and/or prebiotic-rich foods and may indicate the need for microbiome support. Conversely, higher total commensal abundance may indicate potential bacteria overgrowth or probiotic supplementation.

Infection Score:

This is where common infectious microorganisms are reported and includes pathogenic bacteria and intestinal parasites.

Therapeutic Support Options: 

Therapeutic support options are static to serve as potential treatment ideas. Clinician discretion is advised when selecting appropriate therapeutics for individual patients.

- Antibiotics (if warranted)

- Antimicrobial Herbal Therapy

- Antiparasitic Herbal Therapy (if warranted)

- Saccharomyces boulardii

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