Such persons need not be unduly worried about maqui berry side effects. They should not forget that this herbal concoction has been formulated with the extracts of a berry that the Chilean natives are eating for decades, both in its fresh form and in its preserved form. The scientists and doctors who have spent years in researching the maqui berry and then formulating supplements from its extracts would exercise extreme caution to ensure that there are no maqui berry negatives before launching the product in the market.