That question haunted me for months.
Until my friend asked me something I couldn't stop thinking about.
She said:
"Sandra, if you were this disciplined and nothing is working... why did those same habits work ten years ago?"
I didn't have an answer.
But the question cracked something open.
Because she was right.
In my late 30s, I'd lose five pounds by watching what I ate for two weeks.
Now I could be perfect for a month and see nothing.
Same habits.
Completely different results.
Why?
That's when she mentioned something called the fullness signal.
A natural signal tied to GLP-1.
This signal tells your brain:
"I'm full. I'm satisfied. I don't need more."
I'd never heard of it.
But she explained it like this:
When you're younger, that signal is strong.
You eat. You feel full. You stop.
Cravings stay quiet.
Food noise stays low.
Your body responds.
But after 40, something changes.
The fullness signal can get quieter.
And when it does, the old rules stop working.
You feel hungrier than you should.
Cravings get louder.
You eat, but you don't feel satisfied.
And no amount of willpower fixes a signal your body stopped sending.
I wasn't lazy.
I wasn't broken.
It was never a discipline problem.
The fullness signal had changed.