Changes after quitting coffee

It's been about a month.

They said sleep quality improves and you sleep soundly.

That's not wrong (it may vary from person to person)

I really drank a lot of coffee.

The water tastes bland, so I don't drink plain water; I drink coffee instead.

I hung up because I was tired.

It cut off because I was tired.

I've been taking vitamins for a while.

I was still tired, though.

I feel less tired since I quit coffee.

I don't take vitamins these days.

Since I quit coffee, I realize there are tons of places selling it around me, but I don't end up drinking it because it makes me tired.