It found the platform failed to act on 90% of abusive messages that were reported.
High-profile women on Instagram face an "epidemic of misogynist abuse".
That's according to a new report by the UK's Centre for Countering Digital Hate, which analyzed more than 8,000 messages from 5 high-profile female accounts - including Channel 4's Rachel Riley.
It found the platform failed to act on 90% of abusive messages that were reported to them by the studied accounts.
Dr Mary McCauliffe Director of the Gender Studies Programme at UCD says Instagram has a responsibility to address the issue: