Explore our database of over 4000 laboratory markers.

Search and Understand 4000+ Biomarkers

Orange Juice

Array 10 - Multiple Food Immune Reactivity Screen, Cyrex Laboratories

Optimal range:   0.2 - 1.8 ELISA Index

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Oregano

Array 10 - Multiple Food Immune Reactivity Screen, Cyrex Laboratories

Optimal range:   0.4 - 2.6 ELISA Index

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Oregano

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

Reference range:   100% Inhibition, 80% Inhibition, 60% Inhibition, 40% Inhibition, 20% Inhibition, 0% Inhibition

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Oregano, IgG

240 Food Panel: IgA, IgG, IgG4 (US BioTek), US BioTek

Reference range:   Very Low, Low, Moderate, High, Very High

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Ornithine

Urine

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

Optimal range:   3 - 55 qmol/24 hours

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Ornithine

Blood

NutriStat Basic Profile, US BioTek

Optimal range:   101 - 407 umol/L

Ornithine is an intermediate nonprotein-forming amino acid of the urea cycle. Arginine is converted to ornithine via the arginase enzyme, with urea as a byproduct. Ornithine combined with carbamoyl phosphate is then converted into citrulline via the ornithine transcarbamylase (OTC) enzyme. The contribution of carbamoyl phosphate results from the metabolism of ammonia by the enzyme carbamoyl phosphate synthase, and if this magnesium-dependent process is impaired, ammonia buildup, or hyperammonemia can occur.

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Ornithine

Amino Acid Analysis, Quest Diagnostics

Optimal range:   27 - 83 umol/L

Ornithine is an intermediate nonprotein-forming amino acid of the urea cycle. Arginine is converted to ornithine via the arginase enzyme, with urea as a byproduct. Ornithine combined with carbamoyl phosphate is then converted into citrulline via the ornithine transcarbamylase (OTC) enzyme. The contribution of carbamoyl phosphate results from the metabolism of ammonia by the enzyme carbamoyl phosphate synthase, and if this magnesium-dependent process is impaired, ammonia buildup, or hyperammonemia can occur.

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Ornithine

Amino Acid Profile, Qn (Urine), LabCorp

Optimal range:   5 - 76.3 umol/g Cr

Ornithine is an intermediate nonprotein-forming amino acid of the urea cycle.

Arginine is converted to ornithine via the arginase enzyme, with urea as a byproduct. Ornithine combined with carbamoyl phosphate is then converted into citrulline via the ornithine transcarbamylase (OTC) enzyme. The contribution of carbamoyl phosphate results from the metabolism of ammonia by the enzyme carbamoyl phosphate synthase, and if this magnesium-dependent process is impaired, ammonia buildup, or hyperammonemia can occur.

Ornithine can also form polyamines including putrescine via the ornithine decarboxylase (ODC) enzyme, which requires pyridoxal-5-phosphate (vitamin B6) as a cofactor.

Putrescine and other polyamines are crucial to the growth and proliferation of cells.

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Ornithine

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

Optimal range:   4.38 - 15.42 qmol/dL

Ornithine is an intermediate nonprotein-forming amino acid of the urea cycle. Arginine is converted to ornithine via the arginase enzyme, with urea as a byproduct. Ornithine combined with carbamoyl phosphate is then converted into citrulline via the ornithine transcarbamylase (OTC) enzyme. The contribution of carbamoyl phosphate results from the metabolism of ammonia by the enzyme carbamoyl phosphate synthase, and if this magnesium-dependent process is impaired, ammonia buildup, or hyperammonemia can occur.

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ORNITHINE

Urine

Amino Acid Analysis, LC/MS, Quest Diagnostics

Optimal range:   0 - 5 mmol/mol creatinine

Ornithine is an intermediate nonprotein-forming amino acid of the urea cycle. Arginine is converted to ornithine via the arginase enzyme, with urea as a byproduct. Ornithine combined with carbamoyl phosphate is then converted into citrulline via the ornithine transcarbamylase (OTC) enzyme. The contribution of carbamoyl phosphate results from the metabolism of ammonia by the enzyme carbamoyl phosphate synthase, and if this magnesium-dependent process is impaired, ammonia buildup, or hyperammonemia can occur.

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Ornithine

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

Optimal range:   3 - 27 qM/g creatinine

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Ornithine

Amino Acid Profile, Qn (Plasma), LabCorp

Optimal range:   30.1 - 101.3 umol/L

Ornithine is a urea cycle metabolite.

Ornithine can stimulate the release of growth hormone. Growth hormone is necessary for tissue repair and growth. Growth hormone is often low in patients with fibromyalgia.

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Ornithine

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

Optimal range:   0 - 26.8 nmol/mg Creatinine

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Ornithine

NutrEval Plasma - Urine and Blood, Genova Diagnostics

Optimal range:   4.38 - 15.42 Units

Ornithine is an intermediate nonprotein-forming amino acid of the urea cycle.

Arginine is converted to ornithine via the arginase enzyme, with urea as a byproduct. Ornithine combined with carbamoyl phosphate is then converted into citrulline via the ornithine transcarbamylase (OTC) enzyme. The contribution of carbamoyl phosphate results from the metabolism of ammonia by the enzyme carbamoyl phosphate synthase, and if this magnesium-dependent process is impaired, ammonia buildup, or hyperammonemia can occur.

Ornithine can also form polyamines including putrescine via the ornithine decarboxylase (ODC) enzyme, which requires pyridoxal-5-phosphate (vitamin B6) as a cofactor.

Putrescine and other polyamines are crucial to the growth and proliferation of cells.

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Ornithine

Metabolimix+, Genova Diagnostics

Optimal range:   3 - 17 mmol/g creatinine

Ornithine is an intermediate nonprotein-forming amino acid of the urea cycle. Arginine is converted to ornithine via the arginase enzyme, with urea as a byproduct. Ornithine combined with carbamoyl phosphate is then converted into citrulline via the ornithine transcarbamylase (OTC) enzyme. The contribution of carbamoyl phosphate results from the metabolism of ammonia by the enzyme carbamoyl phosphate synthase, and if this magnesium-dependent process is impaired, ammonia buildup, or hyperammonemia can occur.

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Ornithine (Genova)

Amino Acids 40 Profile, Genova Diagnostics

Optimal range:   28 - 117 µmol/L , 2.80 - 11.70 µmol/dL

Ornithine is a urea cycle metabolite.

Ornithine can stimulate the release of growth hormone. Growth hormone is necessary for tissue repair and growth. Growth hormone is often low in patients with fibromyalgia.

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Ornithine (Ornithine transcarbamylase)

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

Optimal range:   0 - 26.8 nmol/mg Creatinine

→ It is a key substrate for the synthesis of proline, polyamines, and citrulline.

→ Higher ornithine blood levels were associated with lower breast cancer risk; also found higher in those with Alzheimer’s and Parkinson’s disease.

→ Ornithine supplements have been utilized for NH3 detoxification in liver disease.

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Ornithine (Plasma)

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

Optimal range:   39 - 132.1 nmol/ML

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Ornithine (Urine)

Amino Acids Analysis, Genova Diagnostics

Optimal range:   3 - 17 micromol/g creatinine

Ornithine is a urea cycle metabolite.

Ornithine can stimulate the release of growth hormone. Growth hormone is necessary for tissue repair and growth. Growth hormone is often low in patients with fibromyalgia.

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Orotate

Organix Comprehensive Profile - Urine, Genova Diagnostics

Optimal range:   0 - 1.01 mcg/mg creatinine

Orotate is a sensitive marker of your liver’s capacity to convert toxic ammonia to non-toxic urea that you can excrete. That capacity can be increased by additional arginine. Ammonia toxicity can also be reduced by supplementation with α-ketoglutarate, magnesium, aspartic acid, and glutamic acid. Ammonia impairs brain function, causing difficulty with thinking, fatigue, headaches, and increased food sensitivities.

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