Ethics Committee vs. IRB vs. REC: Are They the Same Thing?

Are an Ethics Committee, IRB, and REC Different Organizations?

You are preparing a research protocol and one document tells you to obtain “IRB approval.” Another refers to a “Research Ethics Committee.” Your university has an “Ethics Review Committee,” while an international guideline simply says “ethics committee.” Are these different bodies, or are researchers using different names for essentially the same thing?

Often, the terminology overlaps considerably. What matters more than the acronym is the committee's actual mandate: what research it is authorized to review, under which rules, and whether its decisions are recognized for your particular study.

Different Names Can Describe the Same Core Function

What IRB, REC, and Ethics Committee Actually Mean

What Is a Research Ethics Committee?

Research Ethics Committee (REC) is a broad term for a body that independently reviews research protocols involving humans to assess their ethical acceptability and protect participants' rights, safety, dignity, and well-being.

The World Health Organization uses REC extensively in its international guidance. WHO also recognizes that committees performing this function are known by several other names, including Institutional Review Board (IRB), Ethical Review Committee (ERC), Ethical Review Board (ERB), and Human Research Ethics Committee (HREC).

In the Philippines, the 2022 National Ethical Guidelines for Research Involving Human Participants use Research Ethics Committee. The guidelines define an REC as a body making independent decisions concerning the review, approval, and implementation of research protocols or proposals to protect human participants and promote research integrity.

What Is an Institutional Review Board?

Institutional Review Board (IRB) is the standard regulatory term used in the United States for a committee established to review research involving human subjects under applicable federal regulations. The term appears throughout the U.S. Department of Health and Human Services regulations at 45 CFR part 46 and the U.S. Food and Drug Administration regulations at 21 CFR parts 50 and 56.

Functionally, an IRB performs the kind of independent ethical review that many international sources describe as REC review. It evaluates matters such as risks, anticipated benefits, participant selection, informed consent, privacy and confidentiality, and safeguards for participants who may be vulnerable to coercion or undue influence.

That does not make “IRB” the universal name for every research ethics body. It is a term embedded in particular regulatory systems and has become familiar internationally, sometimes even where local regulations formally use another term.

What Does “Ethics Committee” Mean?

Ethics committee is less specific when used without qualification. It may refer to a research ethics committee, but not every committee concerned with ethics reviews research protocols.

For example, healthcare institutions may have clinical ethics committees that help address ethical questions arising in patient care. Universities may also maintain institutional ethics bodies concerned with professional conduct or other matters. These functions should not automatically be confused with formal research ethics review.

Why Are There So Many Acronyms?

Research ethics oversight developed through different national regulatory systems, institutions, and research traditions. As a result, several names now coexist for committees with substantially overlapping functions.

The table is a terminology guide, not a universal equivalence chart. Two committees with different names may perform nearly identical functions, while two bodies both called “ethics committees” may have different authority.

The Name Does Not Tell You Everything About the Committee

Acronyms are convenient shorthand, but they do not establish jurisdiction. The important questions concern authority and scope.

A committee may be established by a university, hospital, government agency, research organization, or another authorized institution. Its remit may cover all human-participant research at that institution or only particular categories of studies. National systems may also impose registration, accreditation, recognition, membership, or operational requirements.

In the Philippines, for example, the Philippine Health Research Ethics Board establishes accreditation requirements for RECs covered by the national system. Calling another group an “IRB” instead of an “REC” would not by itself establish equivalent authority or accreditation.

Does “Institutional” Mean an IRB Can Review Only Its Own Institution?

Not necessarily. The word institutional in IRB should not be used to infer the entire jurisdiction of a particular board. Applicable regulations, institutional agreements, reliance arrangements, multisite research procedures, and national requirements determine which committee may review a study.

Similarly, an REC need not be located physically within the researcher's own department or institution to be the appropriate reviewing body. What matters is whether the relevant research-ethics system recognizes its authority over the proposed study.

Does One Term Mean a Stricter Review Than Another?

No general hierarchy exists in which an IRB conducts a more rigorous review than an REC, or vice versa. The acronym does not indicate whether a study will receive a lighter or more intensive form of review.

Review pathways are separate from committee names. Depending on the governing system and characteristics of the study, a protocol may undergo different forms of assessment. The distinction between exempt, expedited, and full ethics review, for example, concerns review classification rather than whether the reviewing body happens to call itself an IRB or REC.

What Matters More Than the Acronym?

For researchers, four questions are more useful than debating terminology: Is this body authorized to review my study? Does its scope cover my type of research and research site? Does it meet applicable institutional or national requirements? Will its determination satisfy any relevant regulatory, funder, sponsor, or institutional requirements?

If those questions are unresolved, the committee's name alone cannot answer them.

When Different Terminology Refers to the Same Research-Ethics Function

The practical issue is therefore not whether the letters REC can be translated into IRB. It is whether the committee and its decision meet the requirements governing the research.

Common Misunderstandings About Research Ethics Committees

How to Identify the Right Ethics Body for Your Research

Use the terminology preferred by the system governing your research. If your institution calls its committee an REC, there is generally no reason to rename it an IRB simply because an international collaborator uses that term.

Once you identify the correct body, the more consequential question is not what it is called but what the committee actually evaluates in your protocol. That is where the terminology gives way to the substance of ethical review.

Before Submitting to an IRB, REC, or Ethics Committee

Frequently Asked Questions About IRBs and Research Ethics Committees

Focus on Authority and Function, Not the Acronym

How to Cite This Guide

This guide is intended to be read, shared, and used in research, teaching, and academic work. If you draw on its ideas, explanations, or other content, please acknowledge the source by citing the guide. Doing so gives appropriate credit and helps your readers locate the original resource.