It is best not to drink coffee with dairy products. If it's bad for your health, you'd better drink less coffee ... after all, caffeine is not a good thing.

Precautions:

Don't add so much condensed milk. Nestle coffee (espresso 1+2) originally needs sugar.

Do not drink coffee on an empty stomach. It is better to drink coffee in moderation. Coffee contains caffeine.

I think one glass a day is enough, don't drink too much.

Don't drink at night, it will affect your sleep.

It is best to have coffee at 9:00- 1 1:30 in the morning to refresh yourself, and you can arrive one hour earlier.