Mondo Knows Facts
Brief boiling inactivates enzymes that degrade vegetables
Scalding vegetables in boiling water preserves bright colour and crisp texture
Blanching involves plunging fresh vegetables into boiling water or steam for a brief interval before immediately cooling them in ice water. Heat deactivates enzymes such as polyphenol oxidase and lipoxygenase, which would otherwise cause flavour loss and discoloration. Rapid cooling stops the cooking process, preserving vibrant chlorophyll pigments.
Where this comes from
Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.
Go further
More facts like this
Onions produce a volatile chemical that induces tearsChopping onions releases a gas that reacts with eye moisture to form mild acidSalt and anaerobic bacteria ferment cabbage into sauerkrautSubmerging shredded cabbage in natural brine prevents mold while producing tart acidPasteurisation heats liquids to eliminate harmful microbesControlled thermal processing destroys disease microorganisms without boiling liquidHigh thermal processing destroys heat-resistant spores in canningPressure canning reaches high temperatures to eliminate Clostridium botulinum sporesWood smoke coats meat in antimicrobial phenolic compoundsBurning hardwood releases aromatic smoke chemicals that retard surface bacteriaHoney resists microbial growth through low water contentHigh sugar concentration and natural acidity prevent bacteria from surviving in honey
Tags: vegetables, blanching, preservation
Brief boiling inactivates enzymes that degrade vegetables: the short answers
- Where does this come from, and can I check it?
- Scalding vegetables in boiling water preserves bright colour and crisp texture. The figure is taken from US Department of Agriculture, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
- Is this really a food fact?
- Yes. It sits on the Food shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
- What else can I read about it?
- The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.