Eutectic extraction solvents, extraction methods by eutectigenesis using said solvents, and extracts derived from said extraction methods

A eutectic extraction solvent for extracting plant biological material, wherein the eutectic extraction solvent is a clear, stable and fluid mixture comprising:

• (a) betaine (trimethyl glycine) or a hydrated form of betaine;
• (b) at least one hydrogen bond donor compound selected from the group consisting of polyols and organic acids;
• and
• (c) water;
• wherein the ratio of betaine or a hydrated form of betaine to the at least one hydrogen bond donor is from 1:1.5 to 1:3 and the proportion of water added to the mixture is from 15 to 30% by weight;
• with the proviso that the eutectic extraction solvent does not contain any one or more of exogenous sugar, exogenous amine salt, or exogenous anion.