The trend toward organic cotton is growing rapidly.

Time and again, genetically modified cotton is labeled with certifications that skip laboratory tests or only take random seed samples.

Prove that your organic cotton is not genetically modified.

Hohenstein has developed molecular biological detection systems especially for cotton products. We cover all aspects of the supply chain, from raw cotton to yarns and fabrics to end products. Manufacturers, brands, certifiers and consumer protection organizations benefit from clear yes / no results for GMO-free cotton products.

Common Certifications

Hohenstein Method

GMO Testing: One goal – three methods.

GMO testing with the Hohenstein method.

To test your textiles for genetically modified organisms, Hohenstein has developed molecular-biological verification systems specifically for cotton products. We cover all points in the value creation chain, from raw cotton, yarns and fabrics to end products. Manufacturers, brands, certifiers or consumer organizations can benefit from clear yes/no statements for GMO-free products.

GMO testing in accordance with IWA protocol.

As one of the first laboratories in the world to be accredited according to ISO/IWA 32:2019, Hohenstein ensures compliance with the strict GMO verification requirements of the international Global Organic Textile standard (GOTS Version 6.0).

GMO testing in accordance with STANDARD 100 by OEKO-TEX®.

Articles can be tested for GMOs as part of the STANDARD 100 by OEKO-TEX® certification. If specifications are met, the articles can be advertised with the claims “Organic Cotton” or “GMO not detectable."

Two steps to 100% certainty with the Hohenstein Method.

  • The sample is crushed and cotton fibers are mechanically and enzymatically extracted. The genetic material (DNA) is separated from the fibers and purified through a multi-stage process.
  • If the DNA contains a specific target sequence (gene marker), genetic modification is indicated and molecular biological evidence is obtained. Control reactions serve to verify unaltered cotton DNA and exclude false-negative results.

DNA is generally protected in the nucleus of the cotton fiber. In some cases (eg. heavily processed cotton where no more DNA is available), DNA analysis does not work for end products. In this case, processing can be retraced and the raw materials can be tested instead.


  • Product optimization
  • Product identification
  • Marketing claim verification
  • Protection against piracy
  • Quality control

Organic cotton with confidence.

The traceability of GMO-free cotton across the entire textile supply chain.

Meet Pascal Lieberherr.

Visit the Hohenstein Academy to view our GMO Cotton Webcast

(Academy registration is free)

Ben Mead
Managing Director
Hohenstein Institute America