This classic, sensational headline usually refers to lemons, apples or bananas. All three are staple foods in most households, but there are many myths surrounding their effects on digestion.

Let’s leave the tabloid hype behind and see what this common fruit really does to the stomach and intestines.

Lemon: Morning Elixir or Acid Myth?

Probably the most common target of articles about the “miracle detox”. Many believe that warm water with lemon in the morning increases metabolism and alkalizes the body.

The truth is: Although lemons contain citric acid, once metabolized, it has an alkaline effect on the body. However, it definitely does not acidify the stomach – the stomach naturally contains very strong hydrochloric acid (HCl), which a little lemon juice neutralizes.

What it actually does: It promotes the production of bile, which helps digest fats, and thanks to vitamin C, it contributes to the health of the mucous membranes. However, it is not a miracle cure for burning fat.

Apples: The unknown king of intestinal flora

Apples are common to us, but thanks to a specific ingredient: pectin, they are real miracle cures for the intestines.

How it works: Pectin is a soluble fiber that acts as a perfect prebiotic in the body. This means that it nourishes the “good” bacteria in the colon.

What it actually does:
For constipation: A raw apple (ideally with the peel) provides insoluble fiber that mechanically supports emptying.

For diarrhea: Grated and slightly oxidized (brown) apples, on the other hand, help thicken stools because the pectin they contain binds excess water.

Bananas: First aid for an upset stomach
If you’re feeling sluggish, bananas are a sure thing. But why do they work so well?

Here’s how: Bananas are rich in potassium and extremely easy to digest. They also contain resistant starch (especially slightly unripe, green bananas).

What it does: Resistant starch passes through the small intestine undigested and reaches the large intestine, where it contributes to the formation of short-chain fatty acids (SCFA), which protect and nourish the intestinal mucosa. At the same time, bananas naturally neutralize stomach acid, thereby preventing heartburn.

💡 Summary: You don’t have to buy expensive exotic superfoods. A simple apple a day benefits your intestines and intestinal flora much more than most supplements from the pharmacy