History
Since time immemorial bitter principles have played an important role as an agent for keeping the stomach and the intestines healthy.  Even in mediaeval convent recipes from circles of Abbess Hildegard von Bingen mention is made of domestic bitter herbs to support the digestion. Almost 500 years ago, the great author of books on herbs, Leonhart Fuchs, recommended wild chicory to strengthen the stomach and improve movement of the bowels. In comparison to our present-day food, vegetables were rich in bitter principles in former times. Today, on the other hand, there is hardly anybody who remembers bitter cucumbers, carrots or aubergines and the great majority of the bitter principles have been "cultivated out" of "modern" types of vegetables in favour of a "more pleasant" taste.
The consequence of this is that an important and natural stimulus and regulation of the digestion is lacking. In addition, the natural eating control is also tricked because the sweet taste awakens the desire to eat more, although the body does not actually need the additional food. The reason for this is that sweet taste sensations make the body produce more insulin - an effect  which goes hand in hand with the stimulation of the appetite.
Furthermore:
Did you know that in present-day agriculture bitter tasting willow plants are "sprayed away", so that the cows eat more ?

Bitter principles (= Amara)
As well as supplying vital groups of nutrients which are rich in bitter principles, vegetable bitter principles take good care of the stomach and intestines and regulate the daily digestion. Furthermore, the bitter taste signalises to the body. 'Caution, something poisonous could lurk in this food, so you'd better not eat too much of it.
The survival strategy of certain plants is indeed that they are unpalatable for animals. They achieve this by the production of very bitter tasting substances. Animals, and thus human beings, have therefore also developed a natural eating barrier in the course of evolution as soon as something tastes bitter. And thus limits are set against "overfeeding".
Positive side effect:
Bitter principles evidently block hunger for sweet stuff.  Furthermore, they activate the digestion glands such as liver, gall and pancreas, with the result that the digestion takes place faster and more completely.
The basis for a dysbiosis (bad settlement) of the intestines is removed and thus for an overweight belly. The physiological reason for this mechanism is simple: without the bitter stimulus to the digestion the intestines become slow and the result is bacterial bad settlement. The body then develops the famous life-saving ring in order to strengthen the immune resistance by increased production of Leptin, a hormone of the fatty tissue. If, on the other hand, the intestinal flora is in order, the collections of fat in the belly area become superfluous and are slowly reduced by themselves. Because of the fact that our digestive system - as it is - has proved itself in an evolutionary way, it should be supplied in the way with which it has been familiar since ancient times.  Part of this is natural nutrition which also, among other things, contains bitter principles.
In this way both stomach and intestines are set in motion again. A quite normal sequence of eating behaviour, which has been usual since time immemorial, starts up again completely on its own and as a result the digestion takes place more quickly and more completely.

Constituents
Wild vegetables containing bitter principles are, as the name says, rich in bitter principles. Bitter principles do not belong to a standard substance category and the common property is only the bitter taste. The main bitter component of wild artichoke is cynaropikrine, of dandelion taraxine acid and of wild chicory intybine. All bitter plants which we select have a native character, i.e. the bitter principles which were known to the organism of our ancestors are fed to the body and not any exotic bitter substances.