That phrase stuck in my head.
Later that night, curiosity got me… and I found a short presentation explaining what actually changes inside the body after 40 — and why so many things suddenly stop working the same way.
What surprised me most?
Metabolism doesn’t just “slow down.”
It can shift how the body stores and uses fuel.
That was the first time my struggles actually made sense.
And once things made sense… everything felt different.
This short explanation shows what shifts inside the body after 40 — and why normal dieting stops responding