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# GM Potatoes Damages Rats
- URL: https://www.foodconsumer.org/gm_potatoes_damages_rats_0801100703/
- Published: 2010-01-08T18:56:00.000Z
- Updated: 2026-09-15T12:38:28.000Z
- Description: An excerpt from Genetic Roulette: rats fed potatoes engineered to make their own insecticide developed potentially precancerous growth in the digestive tract, partial liver atrophy, enlarged pancreases and intestines, and immune damage. It blames the engineering, not the insecticide.
- Author: Food Consumer
- Tags: GMO, Food Safety, #vivvo-import

**The Health Risks of GM Foods: Summary and Debate**

This section summarizes the health risks of genetically modified foods and serves as a forum for a global discussion and debate. It is organized around the 65 main point summaries presented on the left side of the two-page spreads in Part 1 of [*Genetic Roulette*](http://www.seedsofdeception.com/Public/GeneticRoulette/index.cfm?ref=foodconsumer.org). Each section linked below offers the opportunity for people to submit updates, corrections, challenges and responses. Before making a submittal, please review the full content in that section of the book.

**Contents at a Glance:**

**Part 1: The Documented Health Risks of Genetically Engineered Foods**

> **Section 1: Evidence of reactions in animals and humans.**1.1 [GM Potatoes Damages Rats](http://www.seedsofdeception.com/utility/showArticle?objectID=930&ref=foodconsumer.org) ([see full content)](http://www.seedsofdeception.com/utility/showPage/index.cfm?objectID=public,5092&ref=foodconsumer.org)

**Summary**

1. Rats were fed potatoes engineered to produce their own insecticide.
2. They developed potentially precancerous cell growth in the digestive tract, inhibited development of their brains, livers and testicles, partial atrophy of the liver, enlarged pancreases and intestines and immune system damage.
3. The cause was not the insecticide, but in all likelihood was the process of genetic engineering.
4. GM foods on the market—which were created with the same process—have not been subject to such an extensive testing protocol.

Cited with permission from [http://www.seedsofdeception.com](http://www.seedsofdeception.com/Public/GeneticRoulette/HealthRisksofGMFoodsSummaryDebate/index.cfm?ref=foodconsumer.org)