top of page

Exploring the Role of Placebos

Clinical trials are essential in determining the safety, efficacy, and user satisfaction with consumer products. Among the various components of clinical research, one important aspect for consumer brands to consider is the use of placebos. To support brands in navigating this process, we provide insight into the role of placebos in consumer product trials. We will explore their purpose, discuss ethical considerations, highlight how they assist researchers in evaluating the effectiveness of consumer products, and address additional details that can help consumer brands seeking clinical evidence for their product claims.

Understanding the Purpose of Placebos in Clinical Trials

Placebos are non-affecting substances or interventions designed to mimic the active product being tested. Placebos can take various forms depending on the nature of the consumer product being evaluated. For example, in cosmetic trials, a placebo may be a non-medicated cream or a visually identical product without the active ingredients. In dietary supplement trials, a placebo may be a sugar pill or a capsule containing an inactive substance.

Placebos are used in the gold standard of clinical trials, the randomized controlled trial, as a control group reference point in clinical trials to assess the true effects of the investigational product. By comparing the outcomes of participants receiving the active product with those receiving the placebo, researchers can determine whether the effects observed are due to the product being tested or other factors.

Ensuring Ethical Considerations in the Use of Placebos

Ethical considerations are vital when utilizing placebos in consumer product trials. Brands pursuing clinical research for their products should be aware of several key principles guiding the ethical use of placebos:

Informed Consent

Informed consent is a fundamental ethical requirement for clinical research of any kind. In trials with a placebo, participants must be fully informed about the possibility of receiving a placebo and understand the reasons behind its use in the study. They should also be made aware of the potential risks, benefits, and alternatives involved.


The concept of beneficence ensures that the potential benefits of the study outweigh any potential risks or discomfort associated with the placebo group. Researchers must carefully weigh the benefits and risks for participants and ensure that they receive standard care and treatment throughout the trial. This means that for example, products such as supplements should provide greater benefit to participants than any discomfort arising from the formula (e.g., digestive upset).

Minimizing Harm

Researchers have an obligation to ensure that participants in the placebo group are not exposed to unnecessary harm. Placebo participants should receive appropriate care, monitoring, and follow-up to ensure their well-being. Those given the placebo should still provide the same data as those in the active product arms of a study and should be observed just as closely even in non-blinded trials.

Evaluating Product Effectiveness through Placebos

Placebos provide a crucial baseline for the comparison of formula efficacy in consumer product trials. They enable researchers to determine the true effects of the product under investigation by isolating the specific impact of the active ingredients or a product’s application. Here are additional details on how placebos aid in evaluating product effectiveness:

Differentiating between Real and Perceived Effects

Placebos help researchers distinguish between the actual physiological effects of the product and any psychological or placebo effects experienced by participants. This differentiation is crucial for determining the genuine efficacy of a product.

Assessing Comparative Effectiveness

Through the use of placebos, researchers can assess whether the product provides a statistically significant benefit beyond the placebo effect. By comparing the outcomes of participants receiving the active product with those receiving the placebo, researchers can determine the actual magnitude of the product's effects.

Contextualizing Participant Feedback

Placebos assist researchers in contextualizing participant feedback and determining whether reported improvements are directly attributable to the product itself or influenced by other factors, such as a participant’s expectations, biases, or any other environmental influences. This is why robust clinical testing is essential to support your brand’s product claims, as it provides tangible scientific evidence to support them.

Challenges and Consideration

While placebos are essential tools in clinical trials, their use can present challenges and additional considerations that consumer brands should be aware of:

Participant Expectations

Participants in the placebo group may have expectations or biases that can influence their perceptions and experiences during the trial. Known commonly as the placebo effect, where participants experience improvements due to psychological factors, this can complicate the interpretation of results. Researchers must carefully design the trial to minimize the impact of placebo effects and ensure an accurate evaluation of the product's true efficacy. This is where blinding comes into play, as it conceals the placebo group assignments from participants.

Regulatory Guidelines

Consumer product trials must adhere to regulatory guidelines and requirements specific to the region or market in which the product will be available. This means ascribing to FDA and FTC requirements for most consumer brands in the US.

These guidelines may outline specific considerations for placebo use, such as sample size requirements, blinding procedures, and reporting standards. It is essential for consumer brands to work closely with a reputable CRO experienced in conducting clinical research on consumer products to ensure compliance with relevant regulations.

Participant Retention and Compliance

Maintaining participant retention and compliance throughout the trial is crucial for the integrity of the study. Some participants in the placebo group may experience disappointment or frustration if they don’t see any noticeable effects or are sure they did not receive the active product. Ensuring clear communication, support, and engagement with all participants can help minimize dropout rates and ensure the validity of the study results. Choosing a CRO with a history of high patient retention and engagement rates is particularly important for brands using a placebo in their research.

Balancing Scientific Rigor and Commercial Interests

Consumer brands must strike a balance between the scientific rigor of the trial and their commercial interests. While it is natural to have a vested interest in demonstrating the effectiveness of their products, it is essential to maintain scientific integrity and avoid any undue influence that could compromise the validity and credibility of the study. This is again when a CRO can help ensure that your brand’s research is ethically and scientifically sound, while still aiming to build support for your product claims.

Wrapping Up

Placebos play a critical role in consumer product trials by providing a baseline for comparison and helping researchers assess the true effectiveness of the product being tested. By navigating the challenges associated with the use of placebos, consumer brands can ensure the integrity and reliability of their clinical research, leading to robust evidence that supports their product claims. At every step of the process, collaborating with a reputable CRO experienced in consumer product trials can provide valuable guidance and expertise throughout the process, ultimately benefiting both the brand and the consumers they serve.

Want to create your own clinical trial?

Citruslabs provides a simple and affordable way to prove that your products actually work. At Citruslabs, we design a clinical trial that is right for you and your budget, so you can start sharing research-backed product claims without spending a fortune. We offer the cohesive planning and management required to conduct successful clinical trials, from start to finish. Ready to get started? Let's talk! You can contact us here.


bottom of page