Too Much of Good Thing phrase
Used to indicate that something that is too much good or beneficial can become bad or harmful
If you keep doing exercise this much, you can hurt yourself. You know, it can become too much of a good thing.
I know drinking vitamins is good, but do not have too much of a good thing.
If you takes too many extra classes, you will be stressed. You can have too much of a good thing.
Used to indicate an amount of something that is uncountable.