Indican

Overview and Clinical Significance

Indican (indoxyl sulfate) is a metabolic byproduct formed from tryptophan breakdown in the intestine. It is primarily excreted in urine, serving as a marker for intestinal health and protein metabolism.

Clinical Significance

  • Gut Dysbiosis & Malabsorption: Elevated urinary indican levels suggest poor protein digestion, bacterial overgrowth, or intestinal permeability (leaky gut).
  • Liver & Kidney Function: Indican metabolism involves hepatic detoxification and renal excretion, making it relevant in liver disease and kidney dysfunction.
  • Dietary Influence & Lectins: High indican levels may be linked to excessive protein intake or lectin-rich diets, affecting gut microbiome balance.
  • Diagnostic Applications: Indican testing is used to assess digestive efficiency, microbiome health, and systemic inflammation.

Indican is a valuable biomarker for intestinal health, metabolic function, and protein digestion efficiency.

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Elevated Indican Levels and Associated Conditions

  • Malabsorption & Dysbiosis
    Suggests impaired protein digestion or malabsorption.
    May indicate an overgrowth of “unfriendly” bacteria (dysbiosis) or small intestinal bacterial overgrowth (SIBO).
  • Gastrointestinal Disorders
    Higher indican levels may be observed in inflammatory bowel disease, celiac disease, or conditions affecting gut permeability (“leaky gut”).
  • Liver Implications
    While primarily linked to intestinal processes, increased indican might also reflect altered hepatic conjugation functions.

Indican Levels in Normal Gut Function

  • Baseline Presence
    Low or trace amounts are normal, indicating proper protein digestion and balanced gut flora.
  • Life Stage Factors
    Younger Individuals – Developing.

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Related

Liver Function and Metabolic Markers

  • Alanine Aminotransferase of Serum (ALT) & Serum Aspartaminotransferase (AST):
    These enzymes are released when liver cells are damaged. ALT is more liver-specific, while AST is found in various tissues.

  • Gamma Glutamyl Transpeptidase (GGT) & Common Alkaline Phosphatase (ALP):
    Both markers indicate cholestasis and bile duct injury. Elevated levels suggest problems with bile flow that often come with liver dysfunction.

  • Common Blood Bilirubin & Bile Acids:
    These substances provide insight into the liver’s ability to process and excrete waste products. Accumulation can reflect impaired liver function or bile flow obstruction.

  • Serum Ammonia:
    As the liver normally detoxifies ammonia produced during protein metabolism, high serum ammonia levels point to reduced hepatic detoxification capacity.

  • Serum Ceruloplasmin:
    This copper-binding protein, produced by the liver, is a marker for synthetic liver function and disturbances in copper metabolism.

  • Delta‑Aminolevulinic Acid (ALA):
    A precursor in heme synthesis, abnormal ALA levels can reflect disruptions in liver metabolism and may be relevant in conditions like porphyrias.

  • Glutamated Hydrogenase:
    Likely referring to glutamate dehydrogenase, an enzyme involved in amino acid metabolism; its elevation can indicate mitochondrial injury within liver cells.

  • Indican:
    An indirect marker that may rise when the liver’s capacity to process certain metabolic byproducts is impaired.

Together, these markers provide a comprehensive picture of liver health by assessing both hepatocellular integrity and the efficiency of metabolic and excretory processes.

All Markers