Professor Moro, at that time the head of a children hospital in Heidelberg, found out by experiment that a simple carrot soup decreased the death rate of babies suffering from diarrhea by nearly 50% .

[citation needed] The soup was made by cooking 500 grams of peeled and sliced carrots for one and a half hours in plenty of water, draining and puréeing.

A German study published in 2002[2][3] outlines that acidic oligosaccharides formed in aqueous extracts from carrots (carrot soup) may lead to less adherence of bacterial agents to the mucosal wall of the bowel, thus being a more effective treatment for acute gastrointestinal infections of children than glucose-electrolyte-solution oral rehydration.

The colleague August Heisler had pointed out to Moro the effect of apples as an old folk remedy for intestinal catarrh.

In Moro's opinion, the tannin content of raw grated apples caused certain detoxification processes to alleviate the symptoms of dyspepsia, dysentery and agitation-like illnesses.