What Ingredients to Avoid in Food: The Complete List

With thousands of additives approved for use in food, it's hard to know which ones to worry about. Here's a science-based guide to the ingredients most worth avoiding.

Tier 1: Avoid whenever possible

These ingredients have the strongest evidence of potential harm: - **Partially hydrogenated oils** (trans fats): Linked to heart disease. Banned in many countries but still found in some US products. - **High fructose corn syrup**: Associated with obesity, insulin resistance, and fatty liver disease. - **Artificial colors** (Red 40, Yellow 5, Yellow 6, Blue 1): Linked to hyperactivity in children. Require warning labels in the EU. - **Sodium nitrate/nitrite**: Used in processed meats. Can form carcinogenic nitrosamines. - **BHA and BHT**: Preservatives classified as possible carcinogens by some agencies.

Tier 2: Limit or avoid

These have growing evidence of concern: - **Seed oils** (canola, soybean, corn, sunflower, safflower, cottonseed): High in omega-6, potentially inflammatory. - **Carrageenan**: Thickener linked to gut inflammation in some studies. - **Artificial sweeteners** (aspartame, sucralose, saccharin): Controversial effects on gut microbiome. - **Potassium bromate**: Flour improver classified as possibly carcinogenic. Banned in many countries but not the US. - **Titanium dioxide**: Used as a whitener. Banned in the EU since 2022.

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Tier 3: Be aware

How to remember all of this

You don't have to. CheckIt AI tracks all 100+ flagged ingredients and instantly tells you which ones are in any product you scan. It's the easiest way to avoid harmful additives without memorizing a list.

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APACheckIt AI. (2026). "What Ingredients to Avoid in Food: The Complete List | CheckIt AI". Climaverse PBC. Retrieved from https://getcheck.it/faq/what-ingredients-to-avoid-in-food
MLA"What Ingredients to Avoid in Food: The Complete List | CheckIt AI." CheckIt AI, Climaverse PBC, 2026-04-05. https://getcheck.it/faq/what-ingredients-to-avoid-in-food.
HTML Embed<a href="https://getcheck.it/faq/what-ingredients-to-avoid-in-food">What Ingredients to Avoid in Food: The Complete List | CheckIt AI — CheckIt AI</a>
BibTeX@misc{checkit2026faqwhatingredientstoavoidinfood, title = {What Ingredients to Avoid in Food: The Complete List | CheckIt AI}, author = {CheckIt AI}, year = {2026}, publisher = {Climaverse PBC}, url = {https://getcheck.it/faq/what-ingredients-to-avoid-in-food}, note = {Retrieved 2026-04-05} }