Preparation procedure for food supplements, characterized by the fact that it comprises at least the following stages: In a first stage, a base composition is obtained, consisting of: 1- plant extracts in liquid form concentrated in active ingredients (phytotherapy) : between 20 and 70%; 2- Essential oils (aromatherapy): between 1 and 15%; 3- Water: between 20 and 60%; Optional: 4- Plant extracts in the form of powders concentrated in active ingredients (phytotherapy); 5- Minerals (oligotherapy); 6- Vitamins; 7- Vegetable oils; 8- Marine plasma; 9- Organic silicon (anti-caking agent). In a second stage a solidifying premix is added, consisting of - alginates (example: brown algae E401) and calcium (calcium sulfate) with gelling effect. - Vegetable gum (s) with emulsifying, binding, thickener effect (examples: karaya gum, Sterculia, acacia gum or acacia senegal gum extract): Optional: - Natural or chemical substances with retarding effect (examples: chelators of water like Bambusa bamboo, calcium chelators such as polyphosphates, monosaccharides) - Hydrophilic dry plant (example: Plantago ovata); - Other substances, including chemicals, that also provide the gastro-resistance of the assets.Procedimiento de preparación para complementos alimenticios, caracterizado por el hecho de que comprende al menos las etapas siguientes: En una primera etapa, se obtiene una composición de base, compuesta por: 1- extractos de plantas en forma líquida concentrados en principios activos (fitoterapia): entre 20 y 70 %; 2- Aceites esenciales (aromaterapia): entre 1 y 15 %; 3- Agua: entre 20 y 60 %; Opcional: 4- Extractos de plantas en forma de polvos concentrados en principios activos (fitoterapia); 5- Minerales (oligoterapia); 6- Vitaminas; 7- Aceites vegetales; 8- Plasma marino; 9- Silicio orgánico (antiaglomerante). En una segunda etapa se añade una premezcla solidificante, compuesta por - Alginatos (ejemplo: algas pardas E401) y calcio (sulfato de calcio) con efecto gelificante. -