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National Institutes of Health · United States

Enhancing Mechanistic Research on Precision Probiotic Therapies (R61/R33 Clinical Trial Optional)

Open

Applications close on 2 Jun 2027. Eligible applicant types include nonprofits having a 501(c)(3) status with the IRS, other than institutions of higher education, county governments, public and State controlled institutions of higher education and 12 more.

About this call

The purpose of this notice of funding opportunity (NOFO) is to support highly innovative mechanistic research to accelerate precision probiotic interventions using a milestone-driven, biphasic award mechanism, R61/R33 Phased Innovation Award. Specifically, this NOFO solicits applications that will characterize person-specific features affecting probiotic responses to identify subgroups of probiotic responders and to enhance probiotic clinical outcomes. The ultimate goal of this NOFO is to identify, understand, and develop strategies to address barriers in precision probiotic therapies to account for the heterogenicity in humans that causes inconsistent probiotic responses.

The first phase, funded by the R61, will providing for up to 2 years to identify unique host biological patterns (e.g., native microbiome, immune system, gender, diet, age, genetic background, lifestyle, and health history) that are correlated with heterogeneity of probiotic clinical effects using observational or secondary data analysis studies. The second phase, funded under the R33, will support studies to assess the ability of the unique patterns determined in the R61 phase to detect the improvement of probiotic responsiveness in rigorously designed mechanistic studies in relevant animal models or in human subjects.

Who can apply

• Nonprofits having a 501(c)(3) status with the IRS, other than institutions of higher education
• County governments
• Public and State controlled institutions of higher education
• Public housing authorities/Indian housing authorities
• Independent school districts
• Native American tribal governments (Federally recognized)
• Private institutions of higher education
• For profit organizations other than small businesses
• Others (see text field entitled "Additional Information on Eligibility" for clarification)
• State governments
• Nonprofits that do not have a 501(c)(3) status with the IRS, other than institutions of higher education
• City or township governments
• Native American tribal organizations (other than Federally recognized tribal governments)
• Small businesses
• Special district governments

Other Eligible Applicants include the following:

Alaska Native and Native Hawaiian Serving Institutions; Asian American Native American Pacific Islander Serving Institutions (AANAPISISs); Eligible Agencies of the Federal Government; Faith-based or Community-based Organizations; Hispanic-serving Institutions; Historically Black Colleges and Universities (HBCUs); Indian/Native American Tribal Governments (Other than Federally Recognized); Non-domestic (non-U.S.) Entities (Foreign Organizations); Regional Organizations; Tribally Controlled Colleges and Universities (TCCUs) ; U.S. Territory or Possession; Non-domestic (non-U.S.) Entities (Foreign Organizations) are not eligible to apply.

Non-domestic (non-U.S.) components of U.S. Organizations are not eligible to apply.

Foreign components, as defined in the NIH Grants Policy Statement, are allowed.

Applicant categories are a starting point. The official call decides eligibility.

Topics

Education Health

How to apply

1. Read the full notice of funding opportunity (NOFO) linked from the official page: eligibility, cost sharing and evaluation criteria.
2. Make sure your organisation has an active SAM.gov registration and Unique Entity ID (UEI); registration can take several weeks.
3. For NIH: the organisation and the principal investigator also need eRA Commons accounts; applications are usually submitted through Grants.gov (for example with ASSIST).
4. Prepare the required forms, narrative, budget and attachments exactly as the NOFO specifies.
5. Submit before the deadline and keep the tracking number. Check for amendments before you submit.

From the call text

Who can apply

Not stated in the call text we hold — check the official page

Company stage

Not stated in the call text we hold — check the official page

Single applicant or consortium

Not stated in the call text we hold — check the official page

Where applicants must be based

Not stated in the call text we hold — check the official page

Where to apply

Not stated in the call text we hold — check the official page

Contact

National Institutes of Health · grantsinfo@nih.gov · 301-402-2541

Where these facts come from

Official sources

Official call page · Funder's programme page

Facts on this page come from the funder’s official data, taken on 13 Nov 2026. The funder's own documents, including later amendments, always take precedence.

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