Disclosed is a process for the production of botanic extracts containing at least 15% by weight of oligomeric proanthocyanidins of the OPC A2 type, comprising: (a) subjecting shells of the fruit of Litchi sinensis to extraction with lower, optionally aqueous aliphatic alcohols; (b) subjecting the extracts to chromatographic separation; (c) subjecting the OPC A2-rich fraction obtained in the chromatography step to a liquid/liquid extraction; and (d) removing the resulting organic phase.