What is a CRO in clinical research?

A CRO, or Contract Research Organisation, is a company that provides clinical research services to organisations that want to run studies but do not have an in-house research team. For health and supplement brands, a CRO designs the study protocol, manages ethics submission, recruits participants, oversees data collection, runs the statistical analysis, and prepares the manuscript for publication. The brand (called the sponsor) retains ownership of the data and results.

What does a CRO do for a supplement brand?

A CRO for supplement brands handles the full process of running a clinical trial: writing the study protocol, submitting to an ethics committee for approval, recruiting participants from a verified network, collecting and managing data, running statistical analysis against the pre-specified endpoints, and preparing a manuscript for peer-reviewed publication. The sponsor provides the product and the commercial objectives. The CRO provides the scientific and operational infrastructure.

Why would a health brand use a CRO instead of hiring researchers directly?

Running a clinical trial requires regulatory expertise, a participant recruitment infrastructure, validated data collection systems, a licensed ethics submission process, and a statistician familiar with clinical trial methodology. Building this in-house for a single study is not practical. A CRO already has all of these in place and applies them across many trials simultaneously, which is why they can deliver a study faster and at lower total cost than building equivalent capability internally.

What should I look for when choosing a CRO for a nutrition study?

The most important factors are: (1) experience with nutrition and supplement studies specifically, since regulatory pathways and study designs differ from pharmaceutical research; (2) a participant recruitment network relevant to your study population; (3) transparent pricing with fixed-price contracts; (4) a track record of published outcomes (ask to see example publications); and (5) clear IP terms that assign data ownership to you as the sponsor.

How much does a CRO charge to run a clinical trial?

For nutrition and supplement brands in the UK, CRO fees typically range from £40,000 to £120,000 depending on study design, duration, number of participants, and outcome measures. A short-duration remote study typically falls in the £40,000–£65,000 range. A longer randomised controlled trial with blood biomarkers and a larger cohort will be closer to £80,000–£120,000. See our full guide on clinical trial costs for a detailed breakdown.

What Is a Contract Research Organisation (CRO)?

If you have started researching clinical trials for your health brand, you will have encountered the term CRO. It stands for Contract Research Organisation: a company that provides research services to organisations that want to run clinical studies but do not have an in-house research team to do it.

For health and supplement brands, a CRO is the most practical route to getting a clinical trial designed, run, and published within a commercial timeframe.

What a CRO actually does

The short version: a CRO handles the science and the operations. You provide the product, the commercial objectives, and the budget. The CRO provides everything else required to take a study from idea to published data.

In practice, a full-service CRO for nutrition studies handles the following:

Protocol design. The study protocol defines the research question, participant criteria, outcome measures, data collection procedures, and statistical analysis plan. It is the scientific foundation of the trial and determines whether the results are publishable and credible.
Ethics submission and approval. All clinical research involving human participants requires ethical approval before recruitment can begin. The CRO prepares and submits the ethics application and manages the review process.
Participant recruitment. Recruiting participants who meet your study criteria, at the pace required to hit your timeline, is operationally complex. A CRO with an existing participant network can do this far faster than building a recruitment pipeline from scratch.
Data collection. Whether data is collected at a clinic, at home using a collection kit, or via a digital platform, the CRO designs and manages the process. They use validated methods appropriate to your outcome measures.
Statistical analysis. Once data collection is complete, a statistician runs the pre-specified analysis and produces a results dataset. This is not a post-hoc decision: the analysis plan is agreed before recruitment begins, which is what makes the results credible.
Manuscript preparation. The CRO writes the study up for submission to a peer-reviewed journal. This includes interpreting results, formatting to journal requirements, and supporting the review process through to publication.

What you remain responsible for as the sponsor

The brand running the trial is called the sponsor. In regulatory terms, the sponsor retains ultimate responsibility for the trial: that it is conducted ethically, that participants are protected, and that the results are reported accurately.

In practice, this means:

Providing the product (and product safety data) to the CRO
Agreeing the research question and outcome measures
Reviewing and approving the protocol before ethics submission
Owning the data and the results once the study completes

The CRO acts as your operational partner. The study is yours.

Why brands use a CRO rather than building in-house capability

Running a clinical trial requires an ethics submission process, a participant recruitment infrastructure, validated data collection systems, clinical trial management software, a licensed statistician, and scientific writing expertise. Building this capability for a single study is not economically viable for most brands.

A CRO already has all of it in place and applies it across many trials simultaneously. This is why CROs can deliver studies faster and at lower total cost than building equivalent capability internally. The infrastructure cost is spread across many clients; you benefit from it for your study without carrying the overhead permanently.

Types of CRO: full-service vs. specialist

Large, full-service CROs such as IQVIA or Covance are primarily structured around the pharmaceutical industry. They run large-scale drug trials with hundreds of participants across multiple countries, and their processes and pricing reflect that scale. While some do take on nutrition work, they are generally not well-suited to the shorter, more commercially focused studies that nutrition and supplement brands need.

Specialist CROs focus on specific study types or therapeutic areas. StudySetGo is a specialist CRO for nutrition and supplement brands: the study designs, outcome measures, participant networks, and regulatory expertise are built for this category specifically. A specialist CRO will typically deliver faster, cheaper, and more commercially relevant results for a nutrition brand than a large pharma-facing organisation.

What to look for when choosing a CRO

If you are evaluating CROs for a nutrition or supplement trial, the most important factors are:

Category experience. Has the CRO run nutrition studies before? Supplement and nutrition trials have different regulatory pathways, study designs, and outcome measures than pharmaceutical trials. Look for published examples in your category.
Participant recruitment infrastructure. Ask how participants are recruited and how quickly the CRO can reach target enrolment for your inclusion criteria. A CRO without a pre-built network will take longer and cost more to recruit.
Fixed-price contracts. Scope creep in clinical trials is expensive. Look for a CRO that offers fixed-price contracts with clearly defined deliverables, rather than time-and-materials billing that can expand unpredictably.
Publication track record. Ask to see published papers from studies the CRO has run. The quality of publications tells you more about their scientific rigour than any claims they make about themselves.
IP terms. Confirm that the contract assigns data ownership and IP to you as the sponsor. This is standard in well-structured CRO agreements but worth confirming explicitly.

Frequently asked questions

CRO stands for Contract Research Organisation. It is a company that provides clinical research services to organisations (called sponsors) who want to run studies but do not have an in-house research team. For health brands, a CRO designs, runs, and delivers your clinical trial from protocol to published paper.

CROs operate on commercial timelines (6 to 9 months for most nutrition trials), with fixed-price contracts and the sponsor retaining IP. University partnerships typically take 18 to 36 months, have contested IP terms, and publication timing is controlled by the academic team. For brands with a commercial timeline, a CRO is almost always the right choice. See our full comparison guide.

For nutrition and supplement brands in the UK, CRO fees typically range from £40,000 to £120,000 depending on study design, duration, participant numbers, and outcome measures. See our clinical trial cost guide for a detailed breakdown of what drives price.

In a well-structured CRO agreement, the sponsor (the brand that commissions the study) owns the data, the results, and all IP arising from the trial. This is a contractual default, not an assumption: confirm it explicitly before signing. The CRO is an operational partner; the study belongs to you.

What is a Contract Research Organisation (CRO)?