I used to believe in “willpower”—forcing myself to get up at 5 every day to go running, sticking with it for three months, until my knees were ruined.

A friend handed me a bottle of glucosamine + chondroitin: “Stop being stubborn. Your cartilage has already been worn down. Taking this works better than clenching your teeth and pushing through.”
I took it for two weeks, and my knees stopped hurting.
When I asked about the principle, he said, “Glucosamine directly replenishes the joints—you know those ‘just endure a bit longer’ things? They’re useless.”
Later, I checked my medical exam report and found I was severely deficient in vitamin D. No wonder I was always exhausted.
The doctor prescribed a box of drops. I took it for three days, and I felt more energized than after ten cups of an Americano.
I sighed: the body is basically a chemical reactor—do you really think you can argue with it using sheer willpower?
Last night, I secretly tried melatonin plus magnesium, and I slept like the dead.
This morning, the alarm rang for half an hour and I didn’t hear it—I almost got fired.
Now I know: don’t go against your own receptors. Supplement what you’re missing. It’s better than any motivational “chicken soup.”
Do you say willpower is useful? It is—but only after the molecules have done their job.