Preparation process for dietary supplements, characterised in that it comprises at least the following steps: In a first step a basic composition is obtained, consisting of: 1- Plant extracts in liquid form concentrated in active constituents (phytotherapy): between 20 and 70%; 2- Essential oils (aromatherapy): between 1 and 15%; 3- Water: between 20 and 60%; Optional: 4- Plant extracts in powdered form concentrated in active constituents (phytotherapy); 5- Minerals (oligotherapy); 6- Vitamins; 7- Vegetable oils; 8- Marine plasma; 9- Organic silicon (anticaking agent). In a second step a solidifying premix is added, consisting of: - Alginates (e.g.: brown algae E401) and Calcium (calcium sulphate) with a gelling effect. - Vegetable gum(s) with an emulsifying, binding and thickening effect (examples: Karaya gum, Sterculia, Gum arabic or Acacia senegal gum extract, etc): Optional: - Natural or chemical substances with a retarding effect (examples: water chelators such as Bambusa bamboo, calcium chelators such as polyphosphates, monosaccharides); - Dry hydrophilic plant (e.g: Plantago ovata); - Other substances, even chemicals, also providing the gastro-resistance of the active substances. In a first step a basic composition is obtained, consisting of: 1- Plant extracts in liquid form concentrated in active constituents (phytotherapy): between 20 and 70%; 2- Essential oils (aromatherapy): between 1 and 15%; 3- Water: between 20 and 60%; Optional: 4- Plant extracts in powdered form concentrated in active constituents (phytotherapy); 5- Minerals (oligotherapy); 6- Vitamins; 7- Vegetable oils; 8- Marine plasma; 9- Organic silicon (anticaking agent). 1- Plant extracts in liquid form concentrated in active constituents (phytotherapy): between 20 and 70%; 2- Essential oils (aromatherapy): between 1 and 15%; between 1 and 15%; 3- Water: between 20 and 60%; between 20 and 60%; 4- Plant extracts in powdered form concentrated in active constituents (phytotherapy); 5- Minerals (oligotherapy); 6- Vitamins; 7- Vegetable oils; 8- Marine plasma; 9- Organic silicon (anticaking agent). In a second step a solidifying premix is added, consisting of: - Alginates (e.g.: brown algae E401) and Calcium (calcium sulphate) with a gelling effect. - Vegetable gum(s) with an emulsifying, binding and thickening effect (examples: Karaya gum, Sterculia, Gum arabic or Acacia senegal gum extract, etc): Optional: - Natural or chemical substances with a retarding effect (examples: water chelators such as Bambusa bamboo, calcium chelators such as polyphosphates, monosaccharides); - Dry hydrophilic plant (e.g: Plantago ovata); - Other substances, even chemicals, also providing the gastro-resistance of the active substances. - Alginates (e.g.: brown algae E401) and Calcium (calcium sulphate) with a gelling effect. - Vegetable gum(s) with an emulsifying, binding and thickening effect (examples: Karaya gum, Sterculia, Gum arabic or Acacia senegal gum extract, etc): - Natural or chemical substances with a retarding effect (examples: water chelators such as Bambusa bamboo, calcium chelators such as polyphosphates, monosaccharides); - Dry hydrophilic plant (e.g: Plantago ovata); - Other substances, even chemicals, also providing the gastro-resistance of the active substances.