Never make a salad with tomatoes and cucumbers together.

Natural fruits and vegetables should be consumed because they are nutritious, but you may not be aware that certain of them shouldn’t be combined. Take tomatoes and cucumbers as examples.
Cucumbers and tomatoes are both beneficial to our health. They both include an abundance of water, vitamins, minerals, and antioxidants. But you shouldn’t use both of them at once! Before choosing a component for a salad, we need be aware of that ingredient’s particular digestion time, according to Ayurveda.
Combining vegetables that digest more quickly with vegetables that digest more slowly is not a good idea since the lighter ingredient will end up passing through the colon just as the first one is finished digesting. This will cause food to ferment in the stomach, potentially contaminating the rest of the body. Furthermore, it will impede the fermentation and digestion of sugars and starches, preventing you from enjoying your meal to the fullest. Gases, bloating, and stomach pain brought on by the fermentation process can only make matters worse.

There are other food pairings that you should never attempt, in addition to tomatoes and cucumbers. Let’s examine this:
Fruits after a meal should never be consumed because they take a long time to digest and should never be kept in the stomach for an extended amount of time. You run a higher risk of developing acid reflux and other digestive problems if you eat them right after a meal.
Meat and cheese: Try to limit the amount of protein you eat at a time and stick to one form of protein per meal.
Despite being common, macaroni and cheese (and macaroni and meat) should not be combined since it contains a lot of carbohydrate, which digests more slowly than protein and can lead to fermentation and other digestive issues.

Veggies and cheese: Combining cheese and vegetables just makes bloating more likely.
Orange juice with bread or noodles may damage the enzyme responsible for breaking down starch due to the acid level required to digest the juice.
Melon and watermelon should not be consumed with other fruits; they should be eaten on their own.

Bananas and milk are a well-known food pair that slows down digestion.
Although fruits and yogurt are a popular breakfast pairing, they slow down digestion and damage the intestinal flora.