Explore our database of over 4000 laboratory markers.

Search and Understand 4000+ Biomarkers

Trimethylamine

Urine

Neurotransmitter XL, getTested

Optimal range:   0 - 0.1 µmol/g Crea

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Trimethylamine N-Oxide

Urine

Neurotransmitter XL, getTested

Optimal range:   0 - 600 µmol/g Crea

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Tripelphosphates, urine qualitative

Urinalysis

Reference range:   Undetected, Detected

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Tropomyosin

Array 5 Multiple Autoimmune Reactivity Screen, Cyrex Laboratories

Optimal range:   0 - 3 ELISA Index

Associated with:

• Ulcerative Colitis

• Colon Autoimmunity

• Inflammatory Bowel Disease

Tropomyosin is a cytoskeletal microfilamental protein that regulates actin mechanics. Tropomyosin plays an important role in muscle contraction. Tropomyosin, along with the troponin complex, works with actin in muscle fibers and manages muscle contraction by regulating the binding of myosin. Tropomyosin isoforms are involved in the stabilization of actin filaments, intracellular organelle movement, cell-shape maintenance and cytokinesis.

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Troponin

Heart and Muscle Health

Optimal range:   0 - 0.06 ng/mL , 0 - 60 ng/L

Troponin proteins are released when the heart muscle has been damaged, such as occurs with a heart attack. The more damage there is to the heart, the greater the amount of troponin T and I there will be in the blood.

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Troponin T, High Sensitivity

Heart and Muscle Health

Optimal range:   0 - 13 ng/liter

Troponin T, High Sensitivity (hs-TnT) is an independent prognostic marker that aids in the diagnosis of myocardial infarction (MI) in an acute setting (>22 ng/L for males and >14 ng/L for females), and there is literature supporting its use to assess relative risk for cardiovascular disease (CVD) and adverse cardiovascular events (≥6 ng/L for males and females).

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Trout, cooked

Array 10 - Multiple Food Immune Reactivity Screen, Cyrex Laboratories

Optimal range:   0.1 - 2.4 ELISA Index

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Trypsin

Pancreas Health

Optimal range:   169 - 773 ng/mL

Trypsin is an enzyme made in the pancreas that helps digest protein foods. In pancreatitis, trypsin levels increase in the blood. The trypsin test is the most accurate test for acute pancreatitis.

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Tryptamine

Urine

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

Optimal range:   0.2 - 0.9 umol/g

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Tryptase

Immune System

Optimal range:   2.2 - 13.2 ug/L

Tryptase is an enzyme that is released, along with histamine and other chemicals, from mast cells when they are activated as part of a normal immune response as well as in allergic (hypersensitivity) responses.

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TRYPTASE

Quest Diagnostics, Quest Diagnostics

Optimal range:   0 - 10.99 mcg/L

Tryptase is an enzyme that is released, along with histamine and other chemicals, from mast cells when they are activated as part of a normal immune response as well as in allergic (hypersensitivity) responses.

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Tryptophan

Urine

Neurotransmitter XL, getTested

Optimal range:   30 - 100 µmol/g Crea

Tryptophan is an essential amino acid and the biochemical foundation for serotonin, melatonin, and NAD+ production, linking mood regulation, sleep, immune function, and energy metabolism. On the Neurotransmitter XL panel, it provides insight into how effectively the body converts nutrients into neurotransmitters and cellular energy. Low tryptophan levels—or diversion of tryptophan toward the kynurenine pathway during stress or inflammation—can lead to reduced serotonin and melatonin, resulting in low mood, fatigue, and poor sleep, while also generating neurotoxic metabolites that impair mitochondrial function. Because its metabolism depends on cofactors such as vitamin B6, folate, B12, niacin, iron, and BH4, deficiencies or chronic stress can disrupt tryptophan’s conversion pathways. Interpreted alongside serotonin, kynurenine, NAD+, and neopterin, tryptophan levels offer a window into the biochemical balance between emotional health, inflammation, and mitochondrial energy efficiency.

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Tryptophan

Amino Acid Profile, Qn (Urine), LabCorp

Optimal range:   1 - 207.5 umol/g Cr

Tryptophan is involved in serotonin production via vitamin B6-dependent pathways resulting in the intermediate 5-hydroxytryptophan (5-HTP). 5-HTP is often used as a supplement for serotonin formation instead of tryptophan, which can be quickly metabolized in other pathways.

Serotonin is further metabolized to melatonin via methylation.

Because of these downstream conversions, therapeutic administration of 5-HTP has been shown to be effective for depression, fibromyalgia, binge eating associated with obesity, chronic headaches, and insomnia.

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Tryptophan

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

Optimal range:   2.65 - 6.67 qmol/dL

Tryptophan is involved in serotonin production via vitamin B6-dependent pathways resulting in the intermediate 5-hydroxytryptophan (5-HTP).

5-HTP is often used as a supplement for serotonin formation instead of tryptophan, which can be quickly metabolized in other pathways. Serotonin is further metabolized to melatonin via methylation. Because of these downstream conversions, therapeutic administration of 5-HTP has been shown to be effective for depression, fibromyalgia, binge eating associated with obesity, chronic headaches, and insomnia.

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Tryptophan

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

Optimal range:   3.2 - 8.1 ug/mg CR

Tryptophan is involved in serotonin production via vitamin B6-dependent pathways resulting in the intermediate 5-hydroxytryptophan (5-HTP).

5-HTP is often used as a supplement for serotonin formation instead of tryptophan, which can be quickly metabolized in other pathways. Serotonin is further metabolized to melatonin via methylation. Because of these downstream conversions, therapeutic administration of 5-HTP has been shown to be effective for depression, fibromyalgia, binge eating associated with obesity, chronic headaches, and insomnia.

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Tryptophan

NutrEval Plasma - Urine and Blood, Genova Diagnostics

Optimal range:   2.65 - 6.67 Units

Tryptophan is involved in serotonin production via vitamin B6-dependent pathways resulting in the intermediate 5-hydroxytryptophan (5-HTP). 5-HTP is often used as a supplement for serotonin formation instead of tryptophan, which can be quickly metabolized in other pathways.

Serotonin is further metabolized to melatonin via methylation.

Because of these downstream conversions, therapeutic administration of 5-HTP has been shown to be effective for depression, fibromyalgia, binge eating associated with obesity, chronic headaches, and insomnia.

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Tryptophan

Metabolimix+, Genova Diagnostics

Optimal range:   8 - 58 micromol/g creatinine

Tryptophan is involved in serotonin production via vitamin B6-dependent pathways resulting in the intermediate 5-hydroxytryptophan (5-HTP).

5-HTP is often used as a supplement for serotonin formation instead of tryptophan, which can be quickly metabolized in other pathways. Serotonin is further metabolized to melatonin via methylation. Because of these downstream conversions, therapeutic administration of 5-HTP has been shown to be effective for depression, fibromyalgia, binge eating associated with obesity, chronic headaches, and insomnia.

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Tryptophan

Amino Acid Analysis, Quest Diagnostics

Optimal range:   40 - 91 umol/L

Tryptophan is involved in serotonin production via vitamin B6-dependent pathways resulting in the intermediate 5-hydroxytryptophan (5-HTP).

5-HTP is often used as a supplement for serotonin formation instead of tryptophan, which can be quickly metabolized in other pathways. Serotonin is further metabolized to melatonin via methylation. Because of these downstream conversions, therapeutic administration of 5-HTP has been shown to be effective for depression, fibromyalgia, binge eating associated with obesity, chronic headaches, and insomnia.

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Tryptophan

Urine

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

Optimal range:   25 - 140 qmol/24 hours

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Tryptophan

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

Optimal range:   20 - 93 qM/g creatinine

Tryptophan is involved in serotonin production via vitamin B6-dependent pathways resulting in the intermediate 5-hydroxytryptophan (5-HTP).

5-HTP is often used as a supplement for serotonin formation instead of tryptophan, which can be quickly metabolized in other pathways. Serotonin is further metabolized to melatonin via methylation. Because of these downstream conversions, therapeutic administration of 5-HTP has been shown to be effective for depression, fibromyalgia, binge eating associated with obesity, chronic headaches, and insomnia.

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