The aim of the work was not to enrich the extracts in a particular compound but to evaluate the encapsulation efficiency. Nevertheless, the authors mentioned that around 13% of the
extracted caffeine was present in the precipitate while more than 90% of the EC and ECG was recovered for one of the experiments, which evidences that the precipitate had been enriched in catechins. However, not enough data was presented to evaluate the selectivity of the extraction, precipitation and the quality of the final product.