Can you actually have a ‘slow’ or ‘fast’ metabolism?

Have you ever heard someone claim they have a “fast metabolism”? This typically means they can eat whatever they want without gaining weight.

Meanwhile, others blame their inability to lose weight on having a “slow metabolism”.

But can you actually have a fast or slow metabolism? Let’s see what the science says.

Remind me, what’s metabolism?

Metabolism refers to all the chemical processes which allow your body to function. This includes everything from breathing…

© La Conversation - lundi 2 mars 2026