A substance or hormone that promotes or stimulates the catabolic breakdown of molecules in the body.
Constructed from catabolism with the noun suffix -in, used in biochemistry for active agents or substances, similar to 'insulin' or 'histamine.'
Cortisol is a famous catabolin hormone—when you're stressed, it floods your system to break down body tissues for quick energy, which is why chronic stress actually makes you lose muscle mass.
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