Participate in research that changes what the industry knows
NRI conducts clinical trials on botanical products, essential oils, and nutraceuticals primarily in the SE United States. Participants are usually healthy adults and children who meet specific study criteria. All studies are IRB-approved.
Open studies at NRI
These studies are actively recruiting participants. Click any study to learn more about eligibility, what participation involves, and how to apply.
Perimenopause Symptom Relief Study
A 12-week randomized controlled trial evaluating a botanical supplement for perimenopause symptom relief. Participate from your own home by completing surveys on a weekly basis and optional blood draws at the beginning and end.
Who: Women 35 to 65 experiencing menopausal symptoms
Duration: 12 weeks, home based from anywhere in the US
Compensation: Varies
Learn more and apply →Pediatric First Aid Study
A study evaluating the use of a botanical extract for pediatric comfort and routine first aid. Participate from your home anywhere in the US.
Who: Children ages 2 to 12 with a parent or guardian
Duration: Home-based, parent-reported
Compensation: Provided
Learn more and apply →What to expect when you join an NRI study
Fill out the eligibility form for the study you are interested in. Takes about two minutes. We review every application personally.
If you are a good fit, we will contact you to confirm eligibility. Some studies include a brief phone or in-person screening visit.
Before any study begins, you will review and sign an informed consent document. We explain exactly what the study involves, what is asked of you, and your rights as a participant.
Complete study visits, assessments, or home-based activities as outlined in your specific study. Our team is available throughout to answer questions.
What you need to know before applying
Compensation
NRI compensates participants for their time and travel. Compensation amounts vary by study and are specified in each study listing. Compensation is provided regardless of which study group you are assigned to. Compensation is not contingent on completing the full study, though we strongly encourage completion.
General eligibility
Each study has its own specific eligibility criteria listed in the study description. In general, NRI studies enroll generally healthy adults or children without serious medical conditions. Pregnancy, certain medications, and specific health conditions may affect eligibility. Full criteria are listed for each study.
What we ask of participants
Every participant commits to attending scheduled visits, completing assigned assessments honestly, and following the study protocol. We ask because the data quality depends on it. Studies with high compliance produce results that actually change what the industry knows. That is why you are here.
Your rights as a participant
Participation is always voluntary. You may withdraw from any study at any time without penalty. All studies are reviewed and approved by an independent Institutional Review Board. Your personal information is kept confidential and your data is de-identified in all publications.
Questions about participating in NRI research
Most studies take place in your own home, anywhere in the US. Studies with in-person visits take place at NRI sites, which are primarily located in the Southeast US in Huntsville, AL, Nashville TN, Atlanta GA, and Greenville SC.
Each study page lists the specific eligibility criteria. If you are not sure whether you qualify, apply anyway and we will review your information and let you know. We would rather you ask than self-exclude.
All study products go through safety review before use in human trials. NRI only works with high quality, established brands and all products tested are available on the shelves of reputable suppliers. Every study is reviewed by an independent IRB before any participant is enrolled. Safety monitoring continues throughout each study.
Most NRI studies are blinded, meaning neither you nor the study staff know which group you have been assigned to during the study. This is standard research practice and is what allows the results to be unbiased. After the study, you'll be invited to a results reveal, where you learn which group you were in and what our team discovered.
Sometimes, depending on study timelines and eligibility criteria. If you complete one study and are interested in another, let us know. There is typically a 30-60 day washout period required between studies.
Ready to participate?
See the open studies above and apply online. We respond to every application within five business days.