General
fat burner
What does fat burner mean?
A supplement, usually stimulant-based (thermogenic), sold to raise metabolism, curb appetite and support fat loss during a cut.
"The fat burner kills my appetite but makes me jittery."
Origin
Sports-supplement industry product category.
Frequently asked questions
Do fat burners actually work?
Fat burners can modestly boost metabolism and suppress appetite via stimulants like caffeine, but they only help alongside a calorie deficit, not on their own.
What's in a fat burner?
Most fat burners are stimulant-based, containing caffeine and thermogenic ingredients like green tea extract, yohimbine or cayenne to raise metabolism and curb appetite.
Are fat burners safe?
For healthy adults they're generally tolerated, but their stimulants can cause jitters, raised heart rate and poor sleep, so dosing and timing matter.
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