Do you often have problems in digesting a meal? If you have ever wondered about the reason, it is probably because you eat foods that should never be combined. This causes problems in digestion. You probably have painful gas, heartburn, and an upset stomach.

Dairy and pineapple
Sour fruits such as pineapple cause the digestive system to work a little slower. Pineapple also contains bromelain, an enzymatic complex that can cause health issues when combined with dairy products. If you're adding fruit to your yogurt, try apricots instead of pineapple. Or, skip the fruit and add oats or honey.

A sandwich and coffee
Many people eat breakfast on-the-go, especially when they've had a hectic morning and they're running late for work. A breakfast sandwich and a cup of coffee have become a regular meal choice. The problem is, the simple carbs in bread prevent the calcium in the cheese from being digested properly. Adding instant coffee to the mix ends up providing zero benefits when it comes to heart health.

Potatoes and meat
A steak and fries might sound like a delicious meal. Unfortunately, it's not the healthiest combination. The starch in potatoes needs alkaloid digestive fluids, while the proteins in meat need acidic digestive fluids. When you eat them together, the foods can end up causing heartburn, gas and other digestive issues. Don't eat meat and fried potatoes.

Tomatoes and cucumbers
Tomatoes and cucumbers are a popular combination for a healthy and refreshing salad. But adding these two ingredients together can actually disturb the biochemical pathways of your body. The mixture can cause swelling, and the vitamins that the foods contain won't be digested properly. Eat these foods separately instead of together!

Banana and milk
Sweet fruits that contain a lot of natural sugar can stay inside the body for a longer period of time. This can cause the digestive system to slow down, especially when you combine them with milk.