This abstract seems to encourage their use - well worth checking out which ones you can tolerate so you don't miss out.
http://journals.cambridge.org/action/di ... id=7605840
Beyond antioxidants: the cellular and molecular interactions of flavonoids and how these underpin their actions on the brain
"...Instead, this multiplicity of effects appears to be underpinned by three separate processes: ..."
{{hugs}}
Gay