Extraction method

A method for extraction of natural caffeine from a caffeine containing biological material comprising:

• (i) contacting h caffeine containing biological material with an extraction solvent;
• (ii) separating solids and collecting the solvent extract;
• (iii) contacting the solvent extract from step (ii) with 1.0% to 15% (w/v) of MgO at a temperature from about 70° C. to about 90° C.;
• (iv) waiting until two phases (A and B) are formed in the mixture of step (iii) and recuperating the upper phase (phase A) containing the caffeine;
• (v) optionally concentrating the phase A from step (iv);
• (vi) and optionally crystalizing the caffeine.