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We've documented 147 side effects across 30 common food additives found in US grocery products. Each entry includes severity ratings, scientific references, FDA and EU regulatory status, and counts of products containing each ingredient.
Hyperactivity in children • Behavioral changes and attention deficit symptoms • Allergic reactions (hives, swelling)
Hyperactivity in children • Severe allergic reactions in aspirin-sensitive individuals • Hives and urticaria
Hyperactivity in children • Allergic reactions • Potential link to adrenal tumors
Thyroid tumors in animal studies • Thyroid hormone disruption • Hyperactivity in children
May cross the blood-brain barrier • Hyperactivity in children • Allergic reactions
Brain tumors in animal studies • Hyperactivity • Nausea
Headaches and migraines • IARC classified as 'possibly carcinogenic' (Group 2B) in 2023 • Dizziness and mood changes
Gut microbiome disruption • Genotoxicity (DNA damage) when heated • Glucose and insulin response changes
Potential carcinogenicity (methylene chloride byproduct) • Gut microbiome disruption • Headaches
Headaches (MSG symptom complex) • Flushing and sweating • Chest pain and heart palpitations
Obesity and weight gain • Non-alcoholic fatty liver disease (NAFLD) • Insulin resistance and type 2 diabetes risk
Reasonably anticipated human carcinogen (US NTP) • Endocrine disruption • Stomach tumors in animal studies
Liver enlargement • Thyroid and liver effects • Behavioral issues in children
Nausea and vomiting at higher doses • Liver enlargement • Neurotoxic effects
Forms benzene (carcinogen) when combined with vitamin C • Hyperactivity in children (especially with artificial colors) • Allergic reactions (hives, asthma)
Forms nitrosamines (potent carcinogens) when heated • Linked to colorectal cancer (IARC) • Linked to stomach cancer
Intestinal inflammation • Bloating and digestive discomfort • May trigger or worsen IBD/IBS symptoms
Genotoxicity (DNA damage) • Potential carcinogenicity • Gut inflammation
Allergic reactions (skin, respiratory) • Stomach and liver irritation • Potential endocrine disruption (estrogenic activity)
IARC Group 2B carcinogen (possibly carcinogenic) • Kidney tumors in animal studies • Thyroid tumors
Very high glycemic index (GI 85-105) • Blood sugar spikes • Gut microbiome disruption
Gut barrier disruption • Intestinal inflammation • Promotes metabolic syndrome in animal studies
Digestive discomfort • Liver enlargement in animal studies • Kidney changes in animal studies
Skin and eye irritation • Allergic contact dermatitis • Central nervous system depression at high doses
Mouth ulcers and canker sores • Skin irritation • Mucous membrane irritation
May contain formaldehyde as a preservative • Digestive discomfort in sensitive individuals • Limited long-term safety data in food use
Digestive bloating and gas • May reduce nutrient absorption • Laxative effect in large amounts
Potential intestinal inflammation from nanoparticles • Accumulation in gut tissue (animal studies) • Respiratory issues when inhaled (occupational)
Unknown chemical composition (proprietary blends) • Allergic reactions in sensitive individuals • Headaches and migraines
Contains 4-MEI (4-Methylimidazole) — a possible carcinogen • California Prop 65 cancer warning triggered • Potential immune effects
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CheckIt AI. (2026). "Ingredient Side Effects Guide — Health Risks of Common Food Additives | CheckIt AI". Climaverse PBC. Retrieved from https://getcheck.it/side-effects"Ingredient Side Effects Guide — Health Risks of Common Food Additives | CheckIt AI." CheckIt AI, Climaverse PBC, 2026-03-05. https://getcheck.it/side-effects.<a href="https://getcheck.it/side-effects">Ingredient Side Effects Guide — Health Risks of Common Food Additives | CheckIt AI — CheckIt AI</a>@misc{checkit2026sideeffects,
title = {Ingredient Side Effects Guide — Health Risks of Common Food Additives | CheckIt AI},
author = {CheckIt AI},
year = {2026},
publisher = {Climaverse PBC},
url = {https://getcheck.it/side-effects},
note = {Retrieved 2026-03-05}
}