In short ... To be healthy, our body needs as many basic substances as acids. The rupture of this balance towards an acidification of the ground is the source of many ailments: lack of energy, depression, insomnia, nervousness, headaches, joint pain, eczema, chronic colds, weakness of the immune system, etc. Very common nowadays due to our eating habits and lifestyle, the acidification of the ground can easily be corrected by natural means. This book contains a general presentation and a practical part.