Are There Any Known Side Effects with Polyphenol Booster? Erica H December 02, 2022 00:19 Updated There are no known side effects of taking the extracts contained in Polyphenol Booster. Related articles Are There Any Contraindications with Polyphenol Booster? How Do I Use Polyphenol Booster? What are the ingredients in Polyphenol Booster? How Do I Get My Complimentary A1C Test? Is Polyphenol Booster Allergen-Free?