Usage of and attitudes about green tea extract and Epigallocathechin-3-gallate (EGCG) as a therapy in individuals with Down syndrome.

•Eighteen percent of caregivers gave green tea extract (GTE) or Epigallocathechin-3-gallate (EGCG) to individuals with DS.•Most caregivers who gave GTE or EGCG were younger and highly educated.•Most caregivers utilized the internet, scientific publications and other parents to understand about GTE or EGCG.•The majority of individuals who received GTE or EGCG were reported as less severely affected.