To put it in ELI5 terms.
Losing weight is simply Calories In/Calories Out.
Calories out refers to how much your calories you burn from everything whether that’s exercise or from just existing (metabolism.)
Most things that makes it harder to lose weight affect the Calories Out. Things like PCOS and other things effect hormones which effects yours metabolism which causes the calories out to decrease, meaning you need less calories in to lose weight.
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