Product composed by one or more stilbene polyphenols co-precipitate in lamellar anionic solids, wherein: a) stilbene polyphenols are selected from the group consisting of trans-resveratrol; trans-3,5-Dimethoxy-4'-hydroxy stilbene; trans-3,5,4'-trimethoxy-stilbene; trans-3, 5-dihydroxy-4'-methoxy stilbene; trans-3,5-diacetil-4'-hydroxy-stilbene; trans-3,5,4'-triacetil-stilbene; trans-3,5-dihydroxy-4'-acetil-stilbene; trans-piceide; trans-Pinosilvina; cis-resveratrol; Raponticina; trans Piceatannolo; Rapontigenina; delta-Viniferina; epsilon-Viniferina; Astringina; Combretastatina A-1;and Hopeaphenol; b) lamellar anionic solids means: - hydrotalcites, characterized by the following formula: [M 1- x M x 2] x+ [A n- x/n] x- × mS where M is a valency metal preferably chosen amongst Mg, Zn, Co, Ni, Mn, Cu; M is a valency metal preferably chosen amongst Al, Cr, Fe, V, Co; A n- is an anion characterized by negative charge equal to n, that balances positive charge of lamelles: m is the number of solvent molecules,generally water, co-intercalated, by formula unit of the compound; - the hydroxide double salts (HDSs) characterized by the following formula: [M 1-x M 1+x 3(1-y)] x+ [A n-] (1+3y)/n × mS where M is a valency metal preferably chosen amongst Mg, Zn, Co, Ni, Mn, Cu; A n- is is an anion characterized by a negative charge n, which balances positive charge of lamelles; m is the number of solvent molecules, co-intercalated, for formula unity of compound. a) stilbene polyphenols are selected from the group consisting of trans-resveratrol; trans-3,5-Dimethoxy-4'-hydroxy stilbene; trans-3,5,4'-trimethoxy-stilbene; trans-3, 5-dihydroxy-4'-methoxy stilbene; trans-3,5-diacetil-4'-hydroxy-stilbene; trans-3,5,4'-triacetil-stilbene; trans-3,5-dihydroxy-4'-acetil-stilbene; trans-piceide; trans-Pinosilvina; cis-resveratrol; Raponticina; trans Piceatannolo; Rapontigenina; delta-Viniferina; epsilon-Viniferina; Astringina; Combretastatina A-1;and Hopeaphenol; b) lamellar anionic solids means: - hydrotalcites, characterized by the following formula: [M 1- x M x 2] x+ [A n- x/n] x- × mS where M is a valency metal preferably chosen amongst Mg, Zn, Co, Ni, Mn, Cu; M is a valency metal preferably chosen amongst Al, Cr, Fe, V, Co; A n- is an anion characterized by negative charge equal to n, that balances positive charge of lamelles: m is the number of solvent molecules,generally water, co-intercalated, by formula unit of the compound; - the hydroxide double salts (HDSs) characterized by the following formula: [M 1-x M 1+x 3(1-y)] x+ [A n-] (1+3y)/n × mS where M is a valency metal preferably chosen amongst Mg, Zn, Co, Ni, Mn, Cu; A n- is is an anion characterized by a negative charge n, which balances positive charge of lamelles; m is the number of solvent molecules, co-intercalated, for formula unity of compound. - hydrotalcites, characterized by the following formula: [M 1- x M x 2] x+ [A n- x/n] x- × mS where M is a valency metal preferably chosen amongst Mg, Zn, Co, Ni, Mn, Cu; M is a valency metal preferably chosen amongst Al, Cr, Fe, V, Co; A n- is an anion characterized by negative charge equal to n, that balances positive charge of lamelles: m is the number of solvent molecules,generally water, co-intercalated, by formula unit of the compound; - the hydroxide double salts (HDSs) characterized by the following formula: [M 1-x M 1+x 3(1-y)] x+ [A n-] (1+3y)/n × mS where M is a valency metal preferably chosen amongst Mg, Zn, Co, Ni, Mn, Cu; A n- is is an anion characterized by a negative charge n, which balances positive charge of lamelles; m is the number of solvent molecules, co-intercalated, for formula unity of compound.