What does catabolize mean?
Catabolize is a verb used primarily in biochemistry and physiology to describe the breakdown of complex organic molecules into simpler ones, a process that releases energy the organism can use. When the body catabolizes carbohydrates, fats, or proteins, it is performing catabolism — one half of metabolism, the other half being anabolism, the building-up of complex molecules from simpler ones. The word appears most often in scientific, medical, and fitness writing: researchers may describe how cells catabolize glucose for energy, while athletes and clinicians speak of the body catabolizing muscle tissue during fasting, starvation, or intense training. Though technical in register, the word is transparent enough for general readers once the contrast with anabolic processes is understood, and it offers a precise way to talk about how living systems disassemble matter to power themselves.
verbTo break down complex organic molecules into simpler ones, typically within living organisms, releasing energy in the process; to subject something to catabolism.
- (biochemistry) Of an organism or cell: to break down complex organic compounds into simpler ones, releasing energy (as in catabolism).
- (extended use) To degrade or break down a substance chemically or biologically, especially by metabolic action.
"During intense exercise, the body begins to catabolize muscle protein for fuel."
"The liver helps catabolize fats into fatty acids that can be used for energy."
"In a prolonged fast, the body will eventually catabolize its own muscle protein."
Every time you fast, your body quietly flips a switch and starts to catabolize itself — breaking down its own tissue for fuel.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of catabolize
Catabolize derives from the noun 'catabolism', which was coined in the 19th century from Greek elements: 'kata-' meaning 'down' and 'bole' meaning 'a throwing', so literally 'a throwing down'. The Greek root 'ballein' (to throw) also gives us words like 'symbol' and 'problem'. The verb was formed in parallel with 'metabolize' by adding the '-ize' suffix to the scientific noun, following the pattern of 'anabolize' from 'anabolism'.
Related word forms
How catabolize is actually used
Catabolize is a technical term used chiefly in biochemistry, physiology, and medicine. It is the verbal form of the noun 'catabolism' and is typically found in scientific and clinical writing rather than everyday conversation. It is usually transitive (the body catabolizes glucose), though it can occasionally be used intransitively. The antonym 'anabolize', formed in parallel from 'anabolism', is rarer but follows the same pattern.
Easily confused with catabolize
Anabolize means to build complex molecules from simpler ones, whereas catabolize means to break them down.