The efficacy of herbal medicines depends above all on the choice of plants included in their composition. Thanks to the skills of plant chemists, we know which species within one and the same plant family are the most useful. We know how to determine accurately the ideal date when they should be picked. We can define the most propitious growing conditions, the best region, the best soil, the best aspect. Finally, we know how to choose, with the greatest precision, the most active part of the plant.

This plant selection is carried out on a strictly scientific basis. Such is modern phytotherapy.