Explore our database of over 4000 laboratory markers.

Search and Understand 4000+ Biomarkers

Gamma interferon (IFN-gamma)

Cytokine assay panel for immune profile, SYNLAB

Optimal range:   0 - 8.41 pg/mL

IFN-γ is a helper T-cell 1 (Th1)-derived cytokine and plays a critical role for both innate and adaptive immunity against viral and intracellular bacterial infections and tumor control.

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Gamma Linolenic (Genova)

Genova Diagnostics (various), Genova Diagnostics

Optimal range:   5 - 46 µmol/L

Gamma-linolenic acid (GLA) is an omega-6 fatty acid. The body converts linoleic acid to gamma-linolenic acid and then to arachidonic acid (AA). 

You can get gamma-linolenic acid from several plant-based oils, including evening primrose oil (EPO), borage oil, and black currant seed oil. Most of these oils also contain some linoleic acid.

Gamma-linolenic acid contains 18 carbons and 3 double bonds. It is synthesized from linoleic acid by adding a double bond using the delta-6-desaturase enzyme. This enzymatic reaction is very slow and further impaired in vitamin and mineral deficiencies such as zinc and cobalt. Stress, smoking, alcohol, and systemic inflammatory conditions can also slow this conversion.

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gamma Linolenic Acid

Blood

NutriStat Basic Profile, US BioTek

Optimal range:   0.05 - 0.72 %

Gamma-linolenic acid (GLA) is an omega-6 fatty acid. The body converts linoleic acid to gamma-linolenic acid and then to arachidonic acid (AA). 

You can get gamma-linolenic acid from several plant-based oils, including evening primrose oil (EPO), borage oil, and black currant seed oil. Most of these oils also contain some linoleic acid.

Gamma-linolenic acid contains 18 carbons and 3 double bonds. It is synthesized from linoleic acid by adding a double bond using the delta-6-desaturase enzyme. This enzymatic reaction is very slow and further impaired in vitamin and mineral deficiencies such as zinc and cobalt. Stress, smoking, alcohol, and systemic inflammatory conditions can also slow this conversion.

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Gamma-aminobutyrate

Urine

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

Optimal range:   0 - 7 qmol/24 hours

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Gamma-aminobutyrate

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

Optimal range:   0 - 7 qM/g creatinine

Gamma-aminobutyrate (GABA) is the major inhibitory neurotransmitter found in the CNS and, as such, is important for balancing excitatory action of other neurotransmitters.

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Gamma-aminobutyrate

Amino Acid Profile, Qn (Plasma), LabCorp

Optimal range:   0 - 0.6 umol/L

Gamma-aminobutyrate (GABA) is the major inhibitory neurotransmitter found in the CNS and, as such, is important for balancing excitatory action of other neurotransmitters.

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Gamma-aminobutyrate

Amino Acid Profile, Qn (Urine), LabCorp

Optimal range:   0.5 - 13.1 umol/g Cr

Gamma-aminobutyrate (GABA) is the major inhibitory neurotransmitter found in the CNS and, as such, is important for balancing excitatory action of other neurotransmitters.

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Gamma-aminobutyrate (GABA)

Urine

Neuro Basic Profile (Labrix, Doctor's Data), Doctor's Data

Optimal range:   2 - 5.6 qmol/g

Gamma-aminobutyrate (GABA) is the major inhibitory neurotransmitter found in the CNS and, as such, is important for balancing excitatory action of other neurotransmitters.

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Gamma-aminobutyric acid (GABA)

Neurotransmitters

Optimal range:   2.4 - 12.7 uMol/gCr

GABA stands for Gamma-aminobutyric acid (γ-Aminobutyric Acid) and is a nonessential protein amino acid. GABA is an inhibitory neurotransmitter in the central nervous system.

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Gamma-Gliadin-15-mer IgA

Array 3X - Wheat/Gluten Proteome Reactivity & Autoimmunity Screen, Cyrex Laboratories

Optimal range:   0.1 - 1.5 ELISA Index

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Gamma-Gliadin-15-mer IgA+IgM

Array 14 - Mucosal Immune Reactivity Screen, Cyrex Laboratories

Optimal range:   0.1 - 2.1 ELISA Index

Gliadin is a glycoprotein. It is an alcohol-soluble protein present in wheat and occurring in various forms (a-, g-, and w-gliadins). g-Gliadins-15-mer are considered to be the most ancient of the gluten family. This group of gliadins works with gluten proteins to determine the functional properties of wheat flour.

Known Cross-Reactions: Cerebellar

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Gamma-Gliadin-15-mer IgG

Array 3X - Wheat/Gluten Proteome Reactivity & Autoimmunity Screen, Cyrex Laboratories

Optimal range:   0 - 1.2 ELISA Index

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Gamma-Glutamyl Transferase (GGT)

Liver Health

Optimal range:   0 - 65 U/L , 0 - 65 IU/L

Gamma-Glutamyl Transferase (GGT) is an enzyme most commonly associated with the liver. GGT tests are often run to determine the cause and extent of liver damage or to monitor treatment of alcohol abuse disorders. While an elevated GGT score may be a cause for concern, a normal or low score is generally not.

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gamma-Tocopherol

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

Optimal range:   0.7 - 4.9 mg/L

Gamma-tocopherol is part of the Vitamin E classification group.

The term vitamin E refers to a group of eight naturally occurring compounds, all with different potencies:

– alpha-, beta-, gamma- and delta-tocopherol and

– alpha-, beta-, gamma- and delta-tocotrienol.

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gamma-Tocopherol (Genova)

Genova Diagnostics (various), Genova Diagnostics

Optimal range:   0.06 - 2.99 mg/L

Gamma-tocopherol is part of the Vitamin E classification group.

The term vitamin E refers to a group of eight naturally occurring compounds, all with different potencies:

– alpha-, beta-, gamma- and delta-tocopherol and

– alpha-, beta-, gamma- and delta-tocotrienol.

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Gammaglobulin A

Immune System

Optimal range:   66 - 433 mg/dL

Gammaglobulin A refers to the portion of the gamma globulin protein fraction that includes Immunoglobulin A (IgA), a key antibody involved in immune defense. IgA is primarily found in mucosal areas such as the respiratory and gastrointestinal tracts, as well as in secretions like saliva, tears, and breast milk. It plays a crucial role in neutralizing pathogens at mucosal surfaces, helping prevent infections before they enter the bloodstream. While the term "gammaglobulin A" is sometimes used interchangeably with IgA, it more broadly reflects the presence of IgA within the gamma globulin class of serum proteins. Abnormal levels of gammaglobulin A—or more specifically, IgA—may indicate immune disorders, chronic infections, or certain inflammatory conditions.

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Gammaglobulin G

Immune System

Optimal range:   635 - 1741 mg/dL

Gamma globulin G, more precisely known as Immunoglobulin G (IgG), is the most abundant type of antibody in the human body, accounting for approximately 75% of all serum immunoglobulins. As a key component of the gamma globulin fraction of blood proteins, IgG plays a critical role in the immune system's defense against bacterial and viral infections. It is produced by plasma cells and circulates in the blood and extracellular fluid, where it recognizes and binds to specific antigens, marking them for destruction by other immune cells. IgG is also the only antibody class that can cross the placenta, providing passive immunity to newborns. Clinically, IgG levels are often measured to assess immune function or to diagnose conditions such as immunodeficiencies, chronic infections, or autoimmune diseases.

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Gammaglobulin M

Immune System

Optimal range:   45 - 281 mg/dL

Gamma globulin M, more accurately referred to as immunoglobulin M (IgM), is the first type of antibody produced by the immune system in response to an infection. It is a part of the gamma globulin fraction of serum proteins and plays a critical role in the body’s initial defense against pathogens. IgM is primarily found in the blood and lymphatic fluid, and because of its large size, it is especially effective at forming complexes with antigens and activating the complement system. Elevated levels of IgM can indicate recent or acute infections, autoimmune disorders, or certain types of blood cancers, while low levels may suggest immune deficiencies. As the immune response progresses, IgM is typically replaced by other immunoglobulins such as IgG, which provide longer-lasting immunity.

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Ganglioside Antibodies - GM1 (IgG)

Immune System

Reference range:   Not Detected, Detected

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Ganglioside Antibodies - GM1 (IgM)

Immune System

Reference range:   Not Detected, Detected

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