Skip to content

How to tell if something is GMO free?

3 min read

According to Green America, over 85% of processed foods in the grocery store contain ingredients from genetically modified crops such as corn, soy, and canola. For health-conscious consumers, knowing how to spot and avoid these ingredients is essential for making informed purchasing decisions.

Quick Summary

Navigate the grocery store with confidence by understanding how to identify truly non-GMO products. Learn to recognize key certification labels, common high-risk ingredients, and decode produce codes for smarter shopping choices.

Key Points

  • Check for Certification Seals: Look for the Non-GMO Project Verified seal and the USDA Certified Organic seal for trustworthy assurance against GMOs.

  • Know Your High-Risk Crops: Be aware that most non-organic corn, soy, canola, and sugar beets in the US are genetically modified unless otherwise specified.

  • Organic is Always Non-GMO: Any product certified as USDA Organic is prohibited from containing GMOs, but not all non-GMO items are organic.

  • Decode PLU Codes: For fresh produce, a five-digit code starting with ‘9’ indicates organic, while a five-digit code starting with ‘8’ is for GMO produce (though rarely used).

  • Beware of Processed Foods: Highly processed foods frequently contain GMO derivatives like corn syrup or soy lecithin, so prioritize whole foods whenever possible.

  • Engage Local Farmers: Buying local from farmers' markets and directly asking about growing practices can provide reliable information on sourcing.

In This Article

Key Labels to Look For

When trying to determine if a product is GMO-free, the most straightforward method is to check for third-party certifications and official labels. Two of the most reliable seals in North America are the USDA Certified Organic label and the Non-GMO Project Verified seal.

  • USDA Certified Organic: This is a government-regulated label that prohibits the use of GMOs in farming and food processing. Any product with this seal, especially those marked "100% Organic," can be trusted to be non-GMO. The certification process for organic products requires a comprehensive plan to ensure no GMOs or synthetic pesticides are used.
  • Non-GMO Project Verified: The butterfly seal from the Non-GMO Project is a widely recognized and trusted certification, backed by independent testing. The organization verifies that products meet strict standards for GMO avoidance and have minimal contamination risk. This certification specifically addresses GMOs and is often sought by manufacturers to demonstrate transparency.

Decoding High-Risk Ingredients

Many common processed foods contain derivatives of crops that are widely genetically modified. Unless a product is specifically labeled as organic or non-GMO, assume that ingredients from these high-risk crops are genetically engineered.

Top high-risk crops to watch for:

  • Corn: Found in corn oil, cornstarch, high-fructose corn syrup, and maltodextrin.
  • Soy: Present in soy lecithin, soy oil, soy flour, and soy protein.
  • Canola: Almost all canola oil is derived from genetically modified crops.
  • Sugar Beets: Most granulated sugar in the US comes from genetically modified sugar beets. Look for "pure cane sugar" or organic sugar as alternatives.
  • Cotton: Found in cottonseed oil.
  • Alfalfa: A major GMO crop used for livestock feed.
  • Papaya: The majority of Hawaiian papaya is genetically modified.
  • Summer Squash and Zucchini: Some varieties may be genetically modified.
  • Potatoes and Apples: Certain non-browning varieties have been genetically engineered and are entering the market.

Organic vs. Non-GMO: What's the Difference?

It's important to understand the distinctions between organic and non-GMO labels to make the best choice for your needs. While both labels help avoid GMOs, their scope is different.

Feature USDA Certified Organic Non-GMO Project Verified
Scope Holistic. Governs farming practices, prohibits synthetic pesticides/fertilizers, and addresses animal welfare. Single-issue. Focuses exclusively on the avoidance of genetically modified organisms.
GMO Avoidance Prohibits GMOs entirely. A product labeled "Organic" is automatically non-GMO. Requires ongoing testing and segregation to minimize GMO contamination, with an action threshold of 0.9% for ingredients in human food.
Certification Body Regulated by the U.S. Department of Agriculture (USDA). Independent, third-party certification by the Non-GMO Project.
Testing Not required for certification, as it's a process-based standard. Requires testing of all high-risk ingredients.

How to Read PLU Codes on Produce

For fresh fruits and vegetables, the Price Look-Up (PLU) code on the sticker can sometimes offer clues about whether the item is GMO-free, although this system is not a failsafe indicator.

  • 4-Digit Code: Indicates conventionally grown produce, likely farmed with synthetic pesticides.
  • 5-Digit Code starting with '9': Indicates organically grown produce. For example, an organic banana would be 94011.
  • 5-Digit Code starting with '8': Indicates genetically engineered produce. For example, an engineered banana would be 84011. However, this code is used very rarely in practice.

Other Strategies for Avoiding GMOs

Beyond labels and codes, several other habits can help you steer clear of GMOs.

  1. Prioritize Whole Foods: Since a large percentage of processed foods contain GMO ingredients, focusing your diet on whole, unprocessed foods like fresh produce and lean meats can reduce your exposure.
  2. Buy Local and Ask Questions: Local farmers who sell at farmers' markets are often transparent about their growing practices. Engaging directly with them can provide assurance about how their food is produced.
  3. Use Digital Tools: Apps and shopping guides, like the Environmental Working Group's Food Scores database, can help you find products made without GMO ingredients.
  4. Support Non-GMO Brands: Many companies are committed to offering non-GMO products, making it easier to find reliable options across various product categories.

Conclusion

Navigating the grocery aisles to find GMO-free products requires a combination of label awareness, ingredient knowledge, and smart shopping habits. By consistently checking for the USDA Certified Organic and Non-GMO Project Verified seals, understanding high-risk ingredients, and decoding produce codes, you can make more informed decisions. While no system is perfect, these strategies empower you to take control of what you consume and support a more transparent food system. For further resources and product information, visit the Non-GMO Project website.

Frequently Asked Questions

Yes, products with the USDA Certified Organic seal must comply with regulations that prohibit the use of genetically modified organisms.

Non-GMO Project Verified is a single-issue certification focused specifically on avoiding GMOs, including robust testing. USDA Organic is a broader, government-regulated standard covering overall farming practices, including a prohibition on GMOs.

The most common genetically modified crops include corn, soybeans, canola, and sugar beets. Look for these ingredients on labels and choose organic or verified non-GMO versions.

The Non-GMO Project Verified seal is highly reliable. It is a third-party certification backed by rigorous testing, traceability, and segregation standards to minimize contamination risks.

A five-digit PLU code starting with '8' signifies a genetically engineered product. However, this code is rarely used in practice. A five-digit code starting with '9' indicates organic produce.

In some regions, like the European Union, labeling is not mandatory for meat, milk, and eggs from animals fed GM feed. For full assurance, look for organic or Non-GMO Project Verified animal products, which require non-GMO feed.

Many processed foods use common derivatives from high-risk GMO crops. These can be disguised under names like corn syrup, cornstarch, soy lecithin, or vegetable oil, so prioritize whole foods or look for certified non-GMO versions.

References

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.