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Isocitric Acid

Urine

NutriStat Basic Profile, US BioTek

Optimal range:   19 - 79.2 ug/mgCR

A two-carbon group from Acetyl-CoA is transferred to oxaloacetate to form citric acid. Citric acid is then converted to isocitric acid through a cis-aconitic intermediate using the enzyme aconitase. Aconitase is an iron-sulfate protein that controls iron homeostasis.

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Isocyanate IgG+IgA

Array 11 – Chemical Immune Reactivity Screen, Cyrex Laboratories

Optimal range:   0.2 - 1.5 ELISA Index

Isocyanates are a family of highly reactive, low molecular weight chemicals.

Exposure to toluene diisocyanate (TDI) and other isocyanates can cause irritation of the mucous membranes, eyes, upper respiratory tract, and skin.

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Isocyanate IgM

Array 11 – Chemical Immune Reactivity Screen, Cyrex Laboratories

Optimal range:   0.2 - 2.1 ELISA Index

Isocyanates are a family of highly reactive, low molecular weight chemicals.

Exposure to toluene diisocyanate (TDI) and other isocyanates can cause irritation of the mucous membranes, eyes, upper respiratory tract, and skin.

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Isoleucine

Amino Acids test [Great Plains Laboratory / Doctor's Data], Doctor's Data

Optimal range:   5 - 30 qM/g creatinine

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Isoleucine

Amino Acid Profile, Qn (Plasma), LabCorp

Optimal range:   32.8 - 88.3 umol/L

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

NutrEval Plasma - Urine and Blood, Genova Diagnostics

Optimal range:   4.09 - 17.43 Units

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

Metabolimix+, Genova Diagnostics

Optimal range:   3 - 25 micromol/g 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

Urine

Amino Acids; Urine 24-hour (Doctor's Data), Doctor's Data

Optimal range:   6 - 32 qmol/24 hours

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Isoleucine

Blood

NutriStat Basic Profile, US BioTek

Optimal range:   53.3 - 143 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

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 , 3.5 - 10.4 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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