Potassium bromate and its effects on bread, health and the environment
What it found
Potassium bromate changes how starch and proteins behave in dough, improving bread texture.
It is classified as a possible human carcinogen by IARC under class 2B.
What they found
Studies in people
Cancer classification
IARC has classified potassium bromate as a potential human carcinogen under class 2B. Many reports point to negative impacts on human health.
Other findings
Effects on bread ingredients
In dough, potassium bromate changes starch and protein. It alters how starch swells and thickens. It also removes certain chemical groups from gluten proteins and forms new bonds between them.
Better bread quality
By changing these food molecules, potassium bromate improves the final properties of bread. The authors describe it as one of the best and cheapest dough improvers used in baking.
Measuring it in bread
Scientists have developed numerous techniques to measure how much potassium bromate remains in baked bread.
What the authors conclude
- They explain that potassium bromate strongly affects food molecules like starch and protein during baking.
- They note that many countries have partially or completely stopped its use because IARC classifies it as a potential human carcinogen.
- They describe various methods for measuring how much of it remains in bread.
How it was done
Potassium bromate is widely used in baking because it is an effective and cheap way to improve dough. However, many reports describe negative effects on human health.
The authors gathered and explained existing research on how potassium bromate affects food molecules, human health, the environment and testing methods. They did not run new experiments or study people directly.
What it can’t tell you
- We summarised it from the abstract only.
- This is a summary of past research rather than a new experiment. It cannot prove cause and effect on its own.
- Some findings come from lab tests on food molecules. Those results do not show what happens inside the human body.
Who paid
- Authors work at
- Indian Institute of Food Processing Technology, India
The paper
- Title
- Potassium bromate: Effects on bread components, health, environment and method of analysis: A review
- Type
- ReviewThe authors read earlier studies and describe what they found. It isn’t a new study.
- Evidence
- Studies in people
- Summarised from
- Abstract only
- Cite
- Shanmugavel V, Komala Santhi K, Kurup AH, Kalakandan S, Anandharaj A, Rawson A (2020). Potassium bromate: Effects on bread components, health, environment and method of analysis: A review. Food chemistry. doi:10.1016/j.foodchem.2019.125964PubMed 31865111DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error