Investigation of Changes in the Polyphenol Profile Verified by LC-MS/MS and the Pro-Health Activities of Fruit Smoothie.

The proposed preservation of the smoothie and its storage at refrigeration temperature is adequate to maintain the smoothie's nutritional and functional effect for a 4-month shelf life. Even significant changes in the content of individual subgroups of polyphenols are not drastically reflected in the decrease of the smoothie biological activities.