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QuantiChrom™ Indican Assay Kit


  • For quantitative determination of indican (indoxyl sulfate) in urine samples.

Key Features

  • Fast and sensitive. Linear detection range: 0.2 – 20 mg/dL (8-800 µmoles/L).
  • Fast and high-throughput. Homogeneous “mix-incubate-measure” type assay. The assay takes only 10 min. Can be readily automated for processing thousands of samples per day.


  • OD480nm


  • Urine


  • All


  • 10 min


  • 1000 tests

Detection Limit

  • 0.2 mg/dL

Shelf Life

  • 12 months

More Details

Indican (indoxyl sulfate) is a putrefaction product resulting from bacterial deconjugation of dietary tryptophan to indole in the small intestine. A large body of evidence supports the use of urinary indican testing as a beneficial point-of-care screening tool for dysbiosis, small intestinal bacterial overgrowth (SIBO), constipation, malabsorption, intestinal mucosal permeability etc. Common microorganisms that contribute to positive indican tests include Salmonella, Shigella, Campylobacter jejuni, yersinia enterocolitica, Citrobacter freundi, Citrobacter diversus, Klebsiella pneumoniae, Pseudomonas aeruginosa, certain strains of Escherichia coli, Staphyloccocus aureus, some strains of bacteriodes, Clostridium difficile, Candida albicans, other candida species etc. Traditional Indican test using Obermayer’s reagent gives only qualitative results. BioAssay Systems’ quantitative indican assay kit is based on an improved Curzon and Walsh method. In this assay, indican reacts with chromogen. The color intensity of the product at 480nm is directly proportional to the indican concentration in the sample.

No frequently asked questions for this new product. Please check back later.

For more detailed product information and questions, please feel free to email us. Or for more general information regarding our assays, please refer to Technical Support.

Fukuchi M, et al. (2020). Effect of Lactic Acid Bacteria-Fermented Soy Milk Extract (LEX) on Urinary 3-Indoxyl Sulfate in Japanese Healthy Adult Women: An Open-Label Pilot Study.Nutrition and Dietary Supplements. 12: 301-309. Assay: Indican in human urine.

To find more recent publications, please click here.

If you or your labs do not have the equipment or scientists necessary to run this assay, BioAssay Systems can perform the service for you.

– Fast turnaround
– Quality data
– Low cost

Please email or call 1-510-782-9988 x 2 to discuss your projects.

Indican Assay Kit
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For bulk quote or custom reagents, please email or call 1-510-782-9988 x 1.

Orders are shipped the same day if placed by 2pm PST
Shipping: RT
Carrier: Fedex
Delivery: 1-2 days (US), 3-6 days (Intl)
Storage: -20°C upon receipt

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