Flavors, Flour Treatments and Other Hot Topics
Last reviewed October 18, 2026 · How we grade evidence
In plain words: This section covers flour treatments, flavors and a few hot topics that aren't additives at all. Two flour treatments, potassium bromate and azodicarbonamide, are worth skipping because of animal data and bans elsewhere. MSG and natural flavors are far less scary than their reputations. And folic acid is a proven protector of babies: please don't avoid it.
Some of the loudest online claims are about ingredients that aren't what they seem. MSG was tested in blinded studies and reactions mostly disappeared when people didn't know what they were eating.1 The idea that glyphosate pretends to be glycine was tested directly and not found.2 And folic acid, called "dangerous" in viral videos, prevents hundreds of serious birth defects in the US every year.3
On the other side, potassium bromate caused tumors in animals and California will ban it from 2027,4 and azodicarbonamide forms an animal carcinogen during baking.5 Both are easy to avoid.
At a glance
| Ingredient | Our take | Evidence | US products* |
|---|---|---|---|
| Potassium Bromate (Bromated Flour) | Animal carcinogen; banned in California from 2027. Easy to avoid. | Limited | 606 |
| Azodicarbonamide (ADA) | Not allowed in EU food. Baking forms an animal carcinogen. Easy to skip. | Limited | 795 |
| Sodium Aluminum Phosphate (SALP) | Some aluminum is absorbed; no Alzheimer's link shown. Aluminum-free options exist. | Limited | 8,963 |
| Talc (Magnesium Silicate) | Cancer concerns are from powder and dust. Rare in food. | Limited | 33 |
| Natural Flavors | A broad legal term. Carriers can go unlisted; added MSG cannot. | Limited | 134,301 |
| Artificial Flavors and Vanillin | Same molecule as in vanilla beans. No dietary harm shown. | Very limited | 69,544 |
| MSG (Monosodium Glutamate) | Blinded studies do not back up the reactions. Same glutamate as in tomatoes. | Moderate | 11,071 |
| Shellac (Confectioner's Glaze) | Safe at coating levels. Not vegan. | Very limited | 9,794 |
| Glyphosate Residues | Glycine claim disproven; no human evidence food residues harm. Cancer debate is about sprayers. | Limited | — |
| Lectins | Raw kidney beans are a real risk; cooked beans and grains are healthy. | Limited | — |
| Folic Acid | Prevents birth defects. Safe with MTHFR variants. Keep eating fortified foods. | Strong | 72,760 |
Number of US packaged foods in USDA's Branded Foods database whose ingredient list names it. See each page for details.
Please don't avoid folic acid
If you could become pregnant, fortified bread and cereal help protect a future baby from serious brain and spine defects. People with MTHFR gene variants can use folic acid, according to the CDC. Talk to your doctor before cutting fortified foods.
Cook dried beans properly
The one real lectin risk is raw or undercooked kidney beans. Boil them until soft, or use canned beans.
Frequently asked questions
Is bromated flour safe?
Potassium bromate causes cancer in lab animals, and California bans it from 2027. Choose unbromated flour and bread.
Is MSG safe?
Yes, at normal amounts. Blinded studies don't reproduce reactions when MSG is eaten with food.
Should I avoid enriched flour because of folic acid?
No. Folic acid in enriched flour prevents serious birth defects and is safe, including for people with MTHFR variants.
Sources
- Review of alleged reaction to monosodium glutamate and outcome of a multicenter double-blind placebo-controlled study. The Journal of nutrition, 2000. PubMed 10736382 · doi:10.1093/jn/130.4.1058S
- Glyphosate does not substitute for glycine in proteins of actively dividing mammalian cells. BMC Res Notes, 2019. PubMed 31395095 · doi:10.1186/s13104-019-4534-3
- Retrospective Assessment of Cost Savings From Prevention: Folic Acid Fortification and Spina Bifida in the U.S. American journal of preventive medicine, 2016. PubMed 26790341 · doi:10.1016/j.amepre.2015.10.012
- California Health & Safety Code 109025 (AB 418). Link
- Semicarbazide formation in flour and bread. Journal of agricultural and food chemistry, 2008. PubMed 18303820 · doi:10.1021/jf073198g
This guide is for general education. It is not medical advice and does not replace advice from your doctor, pediatrician, allergist or registered dietitian. If you think you or your child reacted to a food, talk to a health professional. Research changes; we review these pages when new evidence or rules come out. Last reviewed October 18, 2026. Spotted an error? Email [email protected].