Abstract: A method of producing an extract enriched with trigonelline (TRIG) and/or chlorogenic acids (CQA) from a TRIG and/or CQA containing organic plant material like Rubiacea plants, mate plants or the like, the method comprises the steps of: providing an amount of the TRIG and/or CQA containing organic plant material in a container, treating said amount of TRIG and/or CQA containing organic plant material with steam for a defined vaporisation period, exposing the TRIG and/or CQA containing organic plant material steamed in the above step to hot water for least two times for extraction, and removing said extract enriched with trigonelline (TRIG) and/or chlorogenic acid (CQA) from the residue.

Abstract: A green tea extract, especially for use as a functional food item, food supplement, or corresponding ingredient has an enriched content of theanine and theogallin and is decaffeinated.