The degree of hydroxylation influences the activity of antioxidants
in food and biological systems. Radical formation is considered
as a disadvantage for preserving the bioactivity of food
components, such as phenolic compounds. Nevertheless, compounds
such as flavonoids might enhance antioxidant activity by
increasing the extent of hydroxylation . It is
an important to make the appropriate choice of ultrasound parameters
and conditions to treat fruit and vegetables without
affecting the nutrients.