Explore our database of over 10000 laboratory markers.

Search and Understand 10000 Biomarkers

Organic Acids, Comprehensive, Quantitative, Quest Diagnostics

Optimal range:   0 - 0 mmol/mol creatinine

Increased urinary products of the omega fatty acid metabolism pathway may be due to carnitine deficiency, fasting, or increased intake of triglycerides from coconut oil, or some infant formulas.

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Organic Acids Test (OAT) - Nutritional and Metabolic Profile, Mosaic Diagnostics

Optimal range:   0 - 0.14 mmol/mol creatinine

Increased urinary products of the omega fatty acid metabolism pathway may be due to carnitine deficiency, fasting, or increased intake of triglycerides from coconut oil, or some infant formulas.

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Organic Acids, Vibrant Wellness

Optimal range:   0 - 0.23 mmol/mol

Increased urinary products of the omega fatty acid metabolism pathway may be due to carnitine deficiency, fasting, or increased intake of triglycerides from coconut oil, or some infant formulas.

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

Optimal range:   1.5 - 21 nmol/mg Creatinine

Increased urinary products of the omega fatty acid metabolism pathway may be due to carnitine deficiency, fasting, or increased intake of triglycerides from coconut oil, or some infant formulas.

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The GI – Advanced Profile (US BioTek), US BioTek

Optimal range:   510 - 2040 ng/mL

Fecal Secretory IgA is a marker of gut secretory immunity and barrier function.

Immunoglobulin A (IgA) is an antibody playing a critical role in mucosal immunity and is produced in greater quantities than all other types of antibody combined.

In its secretory form, Secretory IgA is the main immunoglobulin found in mucous secretions and provides protection against potentially pathogenic microbes, due to its ability to resist degradation by enzymes and survive in harsh environments such as GI and respiratory tracts.

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Comprehensive Stool Analysis / Parasitology, Mosaic Diagnostics

Optimal range:   30 - 275 mg/dL

As the most abundant class of antibody found in the human intestinal lumen, secretory IgA (sIgA) is recognized as a first line of defense in protecting the intestinal epithelium from enteric pathogens and toxins. It is used to assess gastrointestinal barrier function.

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Adrenal Function Profile (Labrix, Doctor's Data), Doctor's Data

Optimal range:   75 - 330 ug/ml

Every mucosal membrane surface such as the eyes, nose, throat, and gastrointestinal system represent a large portal of entry for pathogenic bacteria, viruses, and yeasts. Secretory IgA (sIgA) is the predominant antibody found on these mucosal membranes, and represents the body’s first line of defense. SIgA levels change in response to stress.

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GI-MAP, Diagnostic Solutions Laboratory | GI-MAP & Food Sensitivity Tests

Optimal range:   510 - 2010 ug/g

Secretory IgA (sIgA) is the dominant antibody in the gut's mucosal immune lining. On the GI-MAP, it measures how actively the gut immune system is defending against pathogens, food antigens, and dysbiosis. The normal range is 510–2010 µg/g. High sIgA indicates active mucosal immune activation; low sIgA suggests reduced gut immune defense, most commonly from chronic stress, NSAID use, or immune exhaustion. Results must always be interpreted alongside pathogens, inflammation markers, and clinical symptoms.

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GI360 stool profile, Doctor's Data

Optimal range:   30 - 275 mg/dL

Fecal Secretory IgA is a marker of gut secretory immunity and barrier function.

Immunoglobulin A (IgA) is an antibody playing a critical role in mucosal immunity and is produced in greater quantities than all other types of antibody combined.

In its secretory form, Secretory IgA is the main immunoglobulin found in mucous secretions and provides protection against potentially pathogenic microbes, due to its ability to resist degradation by enzymes and survive in harsh environments such as GI and respiratory tracts.

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Immune System

Optimal range:   0 - 20 mm/h

The marker Sed Rate by Modified Westergren, also known as the erythrocyte sedimentation rate (ESR) or sedimentation rate, is a common blood test used by doctors to measure inflammation in the body, which is the natural response to injury or infection, often involving the immune system.

This test specifically looks at how quickly red blood cells settle to the bottom of a test tube over the course of one hour. The faster the red blood cells settle, the higher the sed rate, indicating potential inflammation.

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White Blood Cell Differential Test

Optimal range:   1.5 - 8.5 cells/mcL

Segmented neutrophils (also called segs, segmenters, or simply neutrophils on most CBC reports) are the most abundant type of white blood cell in healthy adults. They are called "segmented" because their nucleus is divided into 2 to 5 connected lobes — a sign of full maturity. On a complete blood count with differential (CBC/diff), segmented neutrophils are the dominant white blood cell fraction and are reported as a percentage of total white blood cells (relative value) and as an absolute count. A normal segmented neutrophil percentage is approximately 40–70%. Elevated segmented neutrophils (neutrophilia) most commonly indicate bacterial infection, stress, or inflammation. Low segmented neutrophils (neutropenia/relative neutropenia) most commonly reflect viral infection, medication effects, or bone marrow conditions. The result labeled "segs," "seg neut," "segmenters," or "neutrophils" on your report are all the same measurement.

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White Blood Cell Differential Test

Optimal range:   47 - 55 %

Segmented neutrophils, often called “segs” or “segmenters,” are mature white blood cells that play a key role in fighting infections—especially bacterial infections. They are typically measured as part of a complete blood count (CBC) with differential and are reported as a percentage of total white blood cells or as an absolute count.

A normal range for segmented neutrophils is usually around 40–70%, although this can vary slightly by laboratory. Results should always be interpreted alongside your total white blood cell count, absolute neutrophil count (ANC), and other markers.

High segmented neutrophils (neutrophilia) are commonly seen with infections, inflammation, physical or emotional stress, smoking, or corticosteroid use. In most cases, mild elevations are temporary and resolve once the underlying cause improves.

Low segmented neutrophils may occur with viral infections, medication effects, bone marrow suppression, or certain autoimmune or nutritional conditions. Mild decreases are often not concerning, but persistently low levels—especially with a low ANC—may increase infection risk.

Because “segs,” “segmenters,” and “segmented neutrophils” are often used interchangeably on lab reports, understanding this marker can help you better interpret your CBC results and identify whether your immune system is responding to an active condition.

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Segmented Neutrophils, CSF

Cerebrospinal fluid

Cerebrospinal Fluid (CSF) Analysis

Optimal range:   0 - 6 %

Segmented Neutrophils (CSF) refer to mature white blood cells found in the cerebrospinal fluid (CSF), which play a key role in the body’s immune response. Normally, neutrophils are present in low or undetectable levels in the CSF. Elevated levels of segmented neutrophils in a lab report may indicate an infection, particularly bacterial meningitis, or other inflammatory conditions affecting the central nervous system (CNS). It is important to interpret these results in conjunction with other CSF markers and clinical symptoms to accurately diagnose underlying conditions.

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Selenium

BLOOD - Red Cell

NutriStat Basic Profile, US BioTek

Optimal range:   190 - 500 ug/L

Sources:

The selenium content of grains and vegetables depends on the selenium content of the soil. In meats, selenium content is dependent on the diet of the animals. Foods with higher selenium content include Brazil nuts, seafood (especially tuna), chicken, beef, pork, lamb. Also present in air, water, soil, metallurgy, airborne coal/oil emissions, dandruff shampoo, paints, photo cells, drums, photocopiers, glass, ceramics, rubber, pharmaceuticals.

Absorption factors:

Selenium tends to be well absorbed, and the bioavailability of selenium in the form of selenomethionine is greater than 90%. Sulfur, lead, arsenic, calcium and iron reduced the absorption of selenium. Urine is the main route of excretion and reflects recent dietary intake. Plasma is useful for assessing nutritional selenium status.

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Profile 1, Trace Elements (Hair), Trace Elements

Optimal range:   0.04 - 0.12 Units

Selenium is normally found in hair at very low levels, and several studies provide evidence that low hair Selenium is reflective of dietary intake and associated with cardiovascular disorders. Utilization of hair Selenium levels to assess nutritional status, however, is complicated by the fact that use of Selenium- or sulfur-containing shampoo markedly increases hair Selenium (externally) and can give a false high value.

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Toxic & Essential Elements (Whole Blood), Doctor's Data

Optimal range:   140 - 350 ug/L

Selenium, a trace element found in the whole blood, is a significant component of the Toxic and Essential Elements panel, offering vital insights into an individual's nutritional status and potential toxic exposure. As an essential micronutrient, selenium is crucial for various bodily functions, most notably its role in the synthesis of selenoproteins, which includes important antioxidant enzymes like glutathione peroxidases and thioredoxin reductases. These enzymes play a critical role in protecting cells from oxidative damage caused by free radicals, thereby contributing to immune system function and thyroid hormone metabolism. Selenium's optimal range in the body is narrow: both deficiency and excess can lead to health issues.

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Minerals & Metals Test, Equi.Life

Optimal range:   0.12 - 0.21 Units

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