Explore our database of over 4000 laboratory markers.

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ISOLEUCINE

Urine

Amino Acid Analysis, LC/MS, Quest Diagnostics

Optimal range:   0 - 4 mmol/mol creatinine

Branched Chain Amino Acids (Isoleucine, Leucine, Valine) are the three branched chain amino acids (BCAAs). Branched chain amino acids (BCAA) are essential amino acids and must be obtained from the diet (mainly meat, grains, and dairy).

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Isoleucine

Amino Acid Analysis, Quest Diagnostics

Optimal range:   34 - 98 umol/L

Branched Chain Amino Acids (Isoleucine, Leucine, Valine) are the three branched chain amino acids (BCAAs). Branched chain amino acids (BCAA) are essential amino acids and must be obtained from the diet (mainly meat, grains, and dairy).

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Isoleucine

Amino Acid Profile, Qn (Urine), LabCorp

Optimal range:   5 - 48.1 umol/g Cr

Branched Chain Amino Acids (Isoleucine, Leucine, Valine) are the three branched chain amino acids (BCAAs).

Branched chain amino acids (BCAA) are essential amino acids and must be obtained from the diet (mainly meat, grains, and dairy). 

Not only do the BCAAs account for almost 50% of muscle protein, but they have many metabolic functions. 

BCAAs act as substrates for protein synthesis, energy production, neurotransmitter production, glucose metabolism, and the immune response. They are also involved in stimulation of albumin and glycogen synthesis, improvement of insulin resistance, inhibition of free radical production, and hepatocyte apoptosis with liver regeneration.

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Isoleucine

3102 ION (Blood/Urine) Amino Acids 40, Genova Diagnostics

Optimal range:   4.09 - 17.43 qmol/dL

Branched Chain Amino Acids (Isoleucine, Leucine, Valine) are the three branched chain amino acids (BCAAs). Branched chain amino acids (BCAA) are essential amino acids and must be obtained from the diet (mainly meat, grains, and dairy).

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Isoleucine

Male Comprehensive Metabolic Performance Profile (Urine) Physicians Lab, Physicians Lab

Optimal range:   447.7 - 1211.3 ng/mg CR

Branched Chain Amino Acids (Isoleucine, Leucine, Valine) are the three branched chain amino acids (BCAAs). Branched chain amino acids (BCAA) are essential amino acids and must be obtained from the diet (mainly meat, grains, and dairy).

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Isoleucine (Plasma)

Amino Acids 40 Profile, Genova Diagnostics

Optimal range:   35 - 104 µmol/L , 3.50 - 10.40 µmol/dL

Isoleucine is one of the three branched-chain amino acids (BCAAs) alongside both leucine and valine.

Isoleucine is a common component of proteins, peptides and hormones. Leucine is catabolized as a source of carbon for energy production during exercise in skeletal muscle.

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Isoleucine (Serum)

Serum

Micronutrient (Vibrant America), Vibrant America

Optimal range:   25.5 - 158.9 nmol/ML

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Isoleucine (Urine)

Amino Acids Analysis, Genova Diagnostics

Optimal range:   3 - 28 micromol/g creatinine

Isoleucine is one of the three branched-chain amino acids (BCAAs) alongside both leucine and valine.

Isoleucine is a common component of proteins, peptides and hormones. Leucine is catabolized as a source of carbon for energy production during exercise in skeletal muscle.

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Isoleucine/allo-Isoleucine

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

Optimal range:   0 - 18.3 nmol/mg Creatinine

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Isoleucine/allo-Isoleucine (Plasma)

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

Optimal range:   35.5 - 112.4 nmol/ML

Branched Chain Amino Acids (Isoleucine, Leucine, Valine) are the three branched chain amino acids (BCAAs). Branched chain amino acids (BCAA) are essential amino acids and must be obtained from the diet (mainly meat, grains, and dairy).

Branched-Chain Amino Acids (BCAAs) are required for protein synthesis and are metabolized outside hepatic tissues, unlike most other essential amino acids. They are converted to branched-chain keto acids which require B-complex vitamins. BCAAs have been associated with obesity, weight loss, insulin resistance, and nonalcoholic fatty liver disease (NAFLD). 

BCAA’s are nitrogen donors, facilitate glucose uptake by liver and skeletal muscle, and enhance glycogen synthesis.

- BMI was positively associated with urine 2-hydroxyisobutyrate, isoleucine, valine, tryptophan, and tyrosine.

- Elevated urine levels were associated with higher colorectal cancer.

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Isopropanol, Blood

LabCorp (various), LabCorp

Optimal range:   0 - 0.01 g/dL

Volatile substances in the blood include ethanol, methanol, isopropanol, and acetone. Acetone is generally elevated in metabolic conditions such as diabetic ketoacidosis. Methanol and isopropanol are highly toxic and result from exogenous ingestion.

The presence of isopropanol indicates exposure which may result in intoxication and CNS depression. Ingestion of isopropanol can be fatal if patients do not receive immediate medical treatment.

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Isosatratoxin F

Mycotoxins (Vibrant America), Vibrant America

Optimal range:   0 - 0.1 ng/g

Isosatratoxin F is another trichothecene produced by Stachybotrys chartarum. Several animal studies have shown that isosatratoxin F can cause nasal and pulmonary toxicity when administered intranasally or intratracheally. They showed that pulmonary alveolus cells were injured following intratracheal instillation of isosatratoxin F with marked changes in surfactant synthesis and secretion.

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Isospora belli

GI360 stool profile, Doctor's Data

Reference range:   Not Detected, Detected

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Isovaleryglycine

Organic Acids, Comprehensive, Quantitative, Quest Diagnostics

Optimal range:   0 - 3 mmol/mol creatinine

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ISOVALERYL-2/-METHYLBUT C5

Acylcarnitine Profile, Plasma

Optimal range:   0.01 - 0.21 umol/L

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Isovalerylglycine

Metabolic Analysis Markers (Urine)

Optimal range:   0 - 3.7 mmol/mol creatinine

Isovalerylglycine is a breakdown product of leucine. 

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Isovalerylglycine

Metabolimix+, Genova Diagnostics

Optimal range:   0 - 3.7 mmol/mol creatinine

Isovalerylglycine is produced from leucine catabolism. It is further metabolized via isovaleryl-CoA dehydrogenase. This enzyme requires vitamin B2 as a cofactor.

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Isovalerylglycine

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

Optimal range:   0 - 3.7 mmol/mol creatinine

Isovalerylglycine is produced from leucine catabolism. It is further metabolized via isovaleryl-CoA dehydrogenase. This enzyme requires vitamin B2 as a cofactor.

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Japanese Encephalitis

Vaccination

Vaccination Tracker

Reference range:   Vaccinated, Not Vaccinated

Japanese encephalitis virus (JEV) is a flavivirus related to dengue, yellow fever and West Nile viruses, and is spread by mosquitoes (especially Culex tritaeniorhynchus).

JEV is the main cause of viral encephalitis in many countries of Asia with an estimated 100 000 clinical cases every year.

Although symptomatic Japanese encephalitis (JE) is rare, the case-fatality rate among those with encephalitis can be as high as 30%. Permanent neurologic, cognitive and behavioural sequelae occur in 30–50% of those with encephalitis.

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Jo 1 Antibodies, IgG, Serum

Immune System

Optimal range:   0 - 0.99 Units

This test measures the amount of antibodies to anti-Jo-1 in blood. It is used to help diagnose and manage muscle diseases that affects the immune system such as polymyositis (a type of chronic inflammation of the muscles) associated with autoimmune disease.

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