Explore our database of over 4000 laboratory markers.

Search and Understand 4000+ Biomarkers

Interleukin-6 (IL-6)

Cytokine assay panel for immune profile, SYNLAB

Optimal range:   0 - 8 pg/mL

Interleukin-6 is involved in inflammation and infection responses and also in the regulation of metabolicregenerative, and neural processes.

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Interleukin-8 (IL-8 o CXCL8)

Cytokine assay panel for immune profile, SYNLAB

Optimal range:   0 - 13.87 pg/mL

Interleukin 8 (IL-8) is a promising marker for many clinical conditions and currently being applied by various subspecialties of medicine either for the purpose of rapid diagnosis or as a predictor of prognosis. Nevertheless, IL-8 level increased as a result of many inflammatory conditions, so careful interpretation of IL-8 level is required to make correlation with desired clinical condition's diagnosis or prognosis.

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Interleukin-8, Serum

LabCorp (various), LabCorp

Optimal range:   0 - 66.1 pg/mL

Interleukin 8 (IL-8) is a promising marker for many clinical conditions and currently being applied by various subspecialties of medicine either for the purpose of rapid diagnosis or as a predictor of prognosis. Nevertheless, IL-8 level increased as a result of many inflammatory conditions, so careful interpretation of IL-8 level is required to make correlation with desired clinical condition's diagnosis or prognosis.

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Intermediate Density Lipoprotein (IDL-1)

NutriStat, NutriPATH

Optimal range:   0.1 - 0.6 mmol/L

IDL Cholesterol is a plasma lipoprotein. Cholesterol and triglycerides are insoluble in water and therefore these lipids must be transported in association with proteins. Lipoproteins are complex particles with a central core containing cholesterol esters and triglycerides surrounded by free cholesterolphospholipids, and apolipoproteins, which facilitate lipoprotein formation and function.

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Intermediate Density Lipoprotein (IDL-2)

NutriStat, NutriPATH

Optimal range:   0.1 - 0.4 mmol/L

IDL Cholesterol is a plasma lipoprotein. Cholesterol and triglycerides are insoluble in water and therefore these lipids must be transported in association with proteins. Lipoproteins are complex particles with a central core containing cholesterol esters and triglycerides surrounded by free cholesterolphospholipids, and apolipoproteins, which facilitate lipoprotein formation and function.

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Intermediate Density Lipoprotein (IDL-3)

NutriStat, NutriPATH

Optimal range:   0.1 - 0.6 mmol/L

IDL Cholesterol is a plasma lipoprotein. Cholesterol and triglycerides are insoluble in water and therefore these lipids must be transported in association with proteins. Lipoproteins are complex particles with a central core containing cholesterol esters and triglycerides surrounded by free cholesterolphospholipids, and apolipoproteins, which facilitate lipoprotein formation and function.

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Interpretation

Protein, Total and Protein Electrophoresis, 24 Hour Urine and Immunofixation, Quest Diagnostics

Reference range:   Normal Pattern, Abnormal Pattern

In a Protein Electrophoresis test, part of panels like Total Protein and Protein Electrophoresis, 24 Hour Urine, the "pattern" refers to the arrangement and distribution of protein fractions (such as albumin, alpha-1, alpha-2, beta, and gamma globulins) as revealed in the test results. This pattern, which is identified through the separation of proteins based on size and electrical charge, shows the different protein groups and their relative proportions. A normal pattern typically has albumin as the most abundant protein, followed by various globulins. Abnormalities in this pattern can indicate medical conditions such as liver disease, immune disorders, or kidney issues. The pattern is crucial for diagnosing and monitoring these conditions, providing insight into the body's protein composition and any deviations from normal levels.

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Intestinal Frac

Alk Phos Isoenzyme, LabCorp

Optimal range:   0 - 18 %

The Intestinal Fraction on Labcorp's Alkaline Phosphatase (ALP) Isoenzyme Panel represents the portion of alkaline phosphatase derived from the intestines. Elevated levels of the intestinal fraction may be observed after meals, especially in individuals with blood types B or O who are secretors, as they tend to have higher levels of intestinal ALP following food intake. This isoenzyme is measured to help determine the source of elevated ALP levels and to assess gastrointestinal health. By differentiating the intestinal fraction from other sources of ALP, such as the liver or bone, healthcare providers can better understand the cause of elevated enzyme levels and investigate potential gastrointestinal disorders or other related conditions. The ALP isoenzyme panel's precise measurement of this fraction can guide clinicians in diagnosing conditions related to the intestinal system.

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Intestinal Isoenzymes (Alkaline Phosphatase)

Comprehensive Metabolic Panel (CMP): Biomarkers, Benefits, and Results Explained

Optimal range:   1 - 24 %

Intestinal isoenzymes of alkaline phosphatase are biomarkers that indicate the presence of specific forms of the alkaline phosphatase enzyme within the intestine. This biomarker is significant in assessing the health and function of the intestinal system, as alkaline phosphatase is involved in various physiological processes, including the absorption of nutrients and the maintenance of gut health.

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Intrinsic Factor

Array 5 Multiple Autoimmune Reactivity Screen, Cyrex Laboratories

Optimal range:   0 - 2.5 ELISA Index

Intrinsic factor is a glycoprotein produced by the parietal cells of the stomach. It is necessary for the absorption of vitamin B12 within distal ileum.

Clinical Significance:

Autoantibodies against Intrinsic Factor are considered highly specific to patients with Pernicious Anemia. Intrinsic Factor antibodies are rarely found in the absence of Pernicious Anemia. Less commonly, Intrinsic Factor antibodies may also be found in patients with Graves’ disease and in relatives of patients with Pernicious Anemia.

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Intrinsic Factor Antibodies (Serum)

Vitamins & Minerals

Optimal range:   0 - 1.1 AU/mL

Intrinsic factor antibodies are proteins produced by the immune system that are associated with pernicious anemia. This test detects intrinsic factor antibody (IF antibody) circulating in blood.

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Intrinsic Factor Blocking Antibody

Vitamins & Minerals

Reference range:   Negative, Positive

Intrinsic factor is a protein that is produced by the parietal cells of the stomach. It binds to vitamin B12, thereby allowing absorption of the vitamin by intestinal cells. In pernicious anemia, an autoimmune disorder, autoantibodies are formed against intrinsic factor leading to its deficiency. The lack of intrinsic factor then causes malabsorption of vitamin B12 and subsequent anemia. Autoantibodies can also be formed directly against the parietal cells which similarly leads to inadequate intrinsic factor activity and vitamin B12 deficiency.

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Iodamoeba bütschlii

GI360 stool profile, Doctor's Data

Reference range:   Not Detected, Detected

Iodamoeba buetschlii is considered nonpathogenic or commensal. Infection occurs via fecal-oral route, and indicates increased risk of
exposure to potential pathogens.

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Iodine

NutriStat, NutriPATH

Optimal range:   15 - 160 ug/L

Iodine is an essential mineral that plays a crucial role in thyroid function. The thyroid gland uses iodine to produce thyroid hormones, which are responsible for controlling growth, repairing damaged cells, and supporting a healthy metabolism.

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Iodine

Hair

Toxic & Essential Elements (Hair), Doctor's Data

Optimal range:   0.25 - 1.8 µg/g

Iodine is an essential mineral that plays a crucial role in thyroid function. The thyroid gland uses iodine to produce thyroid hormones, which are responsible for controlling growth, repairing damaged cells, and supporting a healthy metabolism.

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Iodine

BLOOD - Red Cell

NutriStat Basic Profile, US BioTek

Optimal range:   0 - 160 ug/L

Iodine is an essential mineral that plays a crucial role in thyroid function. The thyroid gland uses iodine to produce thyroid hormones, which are responsible for controlling growth, repairing damaged cells, and supporting a healthy metabolism.

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Iodine

Urine

Urinary Toxic & Essential Elements, ZRT Laboratory

Optimal range:   100 - 380 ug/g Cr

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Iodine, 24 Hr Urine

Urinalysis

Optimal range:   100 - 460 ug/24 hr

Monitor exposure to iodine; evaluate for iodine deficiency disorders (IDDs), excessive iodine intake, or iodine in the workplace

Iodine is an essential element for thyroid hormone production. The Iodine 24 Hour Urine Test measures the amount of iodine excreted from the body. It monitors a person’s exposure to iodine and evaluates for iodine deficiency disorders, excessive iodine intake or iodine in the workplace.

Because levels of substances like iodine can fluctuate throughout the day, evaluating a urine collection over 24 hours can provide a more accurate evaluation than a urine test which only looks at a single collection.

Urinary Iodine levels can help determine if a person is getting healthy amounts of iodine from the food they eat.  Unusually high or low levels of iodine can lead to a number of disorders such as hyperthyroidism or hypothyroidism.

This test is usually ordered when someone has had irregular results from thyroid tests such as TSH, T3 and T4. Pregnant and nursing women are often tested for iodine because deficiency can have adverse effects on pregnancy and cause developmental difficulties in infants.

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IODINE, RANDOM URINE

Urinalysis

Optimal range:   34 - 523 mcg/L

Measurement of urinary iodine excretion provides the best index of dietary iodine intake.

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Iodine, Serum/Plasma

Serum Plasma

Metabolic Health

Optimal range:   40 - 92 mcg/L

Iodine is an essential element that is required for thyroid hormone production.

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