Do not do these things with an empty stomach

Drinking coffee
Drinking coffee when your stomach is empty can cause stomach burning or souring. If you only drink coffee in the morning and do not eat breakfast, blood serotonin will decrease and you will find depression later in the day. Advice: If you’re unable to give up the habit of drinking coffee first thing in the morning, consume it with milk or cream: milk fat will reduce the negative effects. Choose natural coffee over freeze-dried.