Grammar fix

cut down on

reduce

To use or do something less, especially because it is unhealthy, expensive, or unnecessary.

phrasal verbB1common

Hear it in context

Notice where the phrase sounds natural.

I'm trying to cut down on sugar because it's bad for my teeth.

To improve my health, I decided to cut down on junk food and exercise more regularly.

One small grammar move makes it sound right.

Not: I want to cut down sugar.

Say: I want to cut down on sugar.

Use 'cut down ON' something. ('Cut down a tree' is a different, literal meaning.)

Tap the one a native speaker would say.

Words that usually travel with it.

cut down on + excess