During World War II, there was a serious dental treatment problem all over the world. Since dental treatment was not yet developed at that time, people had to either have their teeth extracted or endure their decayed teeth for a lifetime.

Bad breath, cavities, cavities and broken teeth were among the most common problems. The problem was so serious that the US government decided to recruit only citizens with at least 6 undamaged teeth into the army.

Recognising the urgency and seriousness of the situation, the Swedish government decided to take a number of unprecedented measures. Firstly, dentists working for the state were tasked with finding a permanent solution to the situation. But before the doctors could find a solution, they had to find the real cause of the problem.

In order to find the cause, doctors and government officials stopped at Vipeholm Mental Hospital, where people suffering from psychological disorders were hospitalised. More than a thousand patients, especially those diagnosed with mental retardation, aged between 15 and 70, were recruited for the experiment and promised a cure. It took about 6 months for the subjects to adapt to their new lives. At the end of this time, patients who caused problems were either forced to sleep or bathed in cold water.

Hudo Froderberg, the only doctor at Vipeholm, and other staff members divided the subjects into seven different categories between 0 and 6. The 0 group was considered even lower than animals (!), while the high scorers were placed under extensive surveillance.

During the first two years of the experiment, the patients were given half the sugar found in a normal Swedish meal, fluoride tablets, small amounts of starch and vitamins A, B and D. At the end of the two years, no cavities were observed. The final phase was therefore started.

In the final phase of the experiment, the patients were divided into four different groups and given foods containing twice as much sugar as Swedish food. The first group was given sweet buns with extra sugar, the second group was given sugary drinks, and the third and fourth groups were given caramel, chocolate and toffee. After less than two weeks, all groups except those given the drinks developed tooth decay, cavities and bad breath. Among the patients in pain, those with low levels were not treated.

This event, in which patients with mental disorders were preferred as subjects, was written in human history as a black stain...