Institutional review boards (IRBs) have a reputation for impeding research. This reputation is understandable inasmuch as many studies are poorly designed, exploit participants, or do not ask a relevant question , and it is entirely proper that IRBs should reject such proposals. However, IRBs also frequently reject or tamper with perfectly sound and relevant studies in the name of protecting participants from harm, in accordance with the widely accepted message that “clinical research is justified only when participants are protected from (...) excessive risks”. Here, I argue that IRBs should never reject a study because it poses too high a risk to participants, and that their role should be confined to ensuring that risks and any potential benefits are fully explained to potential participants. Everyone should have the right to participate in research without paternalistic decisions about risk being made on their behalf. (shrink)