- Synthesized in muscle myofibrillar proteins; urine marker associated with skeletal muscle.
- 3-methylhistidine is best measured in a diet maintaining a constant meat intake. Evaluate amino acid status and levels of activity.
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3-Methylhistidine is an amino acid which is excreted in human urine.
The measurement of 3-methylhistidine provides an index of the rate of muscle protein breakdown. 3-Methylhistidine is a biomarker for meat consumption, especially chicken. It is also a biomarker for the consumption of soy products.
- Urinary 1-Methylhistidine Is a Marker of Meat Consumption in Black and in White California Seventh-day Adventists [L]
- Urinary Biomarkers of Meat Consumption [L]
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This methylated form of histidine comes from muscle tissue, both dietary and endogenous, where it is part of the muscle proteins actin and myosin. A moderate level of urine 3-methylhistidine is normal.
3-Methylhistidine is a biomarker for meat consumption, especially chicken. It is also a biomarker for the consumption of soy products.
Elevated levels suggest either an inordinately high intake of dietary actin/myosin or accelerated catabolism of muscle tissue. 3-Methylhistidine excretion is increased after strenuous physical exercise and also occurs in muscle wasting conditions - dystrophies, lack of exercise, extended bed rest, terminal stages of severe illness. Convulsions and seizures also feature increased urinary 3-methylhistidine. There is some correlation between elevated 3-methylhistidine and increased need for vitamin B12, folic acid, methionine and perhaps histidine if it is marginal or low.
If these deficiencies show up elsewhere on this test, then even though protein is burning at a rate, the Krebs cycle is operating at a lower rate than normal. This is consistent with fatigue and low body temperature.
If Histidine is also high:
May indicate excessive protein intake. Muscle protein breakdown is indicated.
If Beta-Alanine is also high:
Possible cause for food sensitivity reactions when combined with low taurine and high Beta-Alanine due to impaired renal tubular resorption.
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1-Methylhistidine, 1-Methylhistidine (Plasma), 2-Methylhippuric Acid, 2-Methylsuccinic Acid, 3,4-Dihydroxyhydrocinnamic Acid, 3,5-Dihydroxybenzoic Acid, 3-Methylhistidine (Plasma), 3-Phenylpropionylglycine, 4-Hydroxybenzoic Acid, 4-Hydroxyphenylacetic Acid, 4-Hydroxyphenylpyruvic Acid, 5-Hydroxyindoleacetic Acid, 8-Hydroxy-2'-deoxyguanosine, a-Hydroxybutyric Acid, a-Ketobutyric Acid, a-Ketoglutaric Acid, a-Ketoisovaleric Acid, a-Aminoadipic Acid (Plasma), a-Keto-b-methylvaleric Acid, a-Ketoisocaproic Acid, Adipic Acid, Alanine, Alanine (Plasma), Aldosterone, Anserine (Plasma), Anthranilic Acid, Arabinitol, Arginine (Plasma), Arginosuccinic Acid, Arginosuccinic Acid (Plasma), Asparagine (Plasma), Aspartic Acid (Plasma), b-Hydroxybutyric Acid, b-Alanine (Plasma), b-Hydroxyisovaleric Acid, Benzoic Acid, Benzoylform, Branched Chain Alpha-Keto Organic Acids, Carnosine, Carnosine (Plasma), cis-Aconitic Acid, Citric Acid, Citrulline (Plasma), Cortisol, Cortisone, Creatinine, Cystathionine (Plasma), Cystine (Plasma), D-Lactic Acid, Equol, Ethanolamine (Plasma), Ethylmalonic Acid, Formiminoglutamic Acid, Fructose, Fumaric Acid, g-Aminobutyric Acid (Plasma), Glucaric Acid, Glucose, Glutamic Acid (Plasma), Glutamine (Plasma), Glutamine / Glutamate Ratio (Plasma), Glutaric Acid, Glycine (Plasma), Glycylproline (Plasma), Hexanoylglycine, Hippuric Acid, Histidine (Plasma), Homocitrulline (Plasma), Homocystine (Plasma), Homogentisic Acid, Homovanillic Acid, Hydroxykynurenine, Hydroxyproline, Hydroxyproline (Plasma), Indoleacetic Acid, Isocitric Acid, Isoleucine/allo-Isoleucine (Plasma), KT Ratio (Plasma), Kynurenic Acid, Kynurenine (Plasma), Lactic Acid, Leucine (Plasma), Lysine (Plasma), Malic Acid, Mandelic Acid, Methionine (Plasma), Methylmalonic Acid, Microalbumin, Ornithine, Ornithine (Plasma), Orotic Acid, Oxalic Acid, pH, Phenylacetic Acid, Phenylalanine (Plasma), Phosphate, Phosphoethanolamine (Plasma), Picolinic Acid, Pimelic Acid, Proline (Plasma), Pyridoxic Acid, Pyroglutamic Acid, Pyruvic Acid, Quercetin, Quinolinic Acid, Sarcosine (Plasma), Sebacic Acid, Serine (Plasma), Suberic Acid, Suberylglycine, Succinic Acid, Sulfocysteine (Plasma), Tartaric Acid, Taurine (Plasma), Threonine (Plasma), Total Branched Chain Amino Acids (Plasma), Tryptophan (Plasma), Tyrosine (Plasma), Valine (Plasma), Vannilylmandelic Acid, Xanthurenic Acid