We’re studying the microbiome after 60—what changes, and why it matters.

Your participation could help us understand the key microbiome changes that occur later in life.

Recruitment is ongoing from May 2025 until November 2025.

For adults aged 60+ (see criteria)

United States
By Kimberley Sukhum, PhD
A Tiny Health box, a mobile phone and part of an envelope for a gut testing application

As we age, our gut microbiome—the trillions of bacteria residing in our digestive tract—experiences notable shifts.1

These changes can lead to decreased microbial diversity and an increase in pro-inflammatory bacteria, potentially contributing to age-related health issues such as weakened immunity2, metabolic disorders, and cognitive decline. While both men and women experience shifts in microbial composition as they age, for women, the transition into postmenopause brings hormonal changes that can further impact the gut microbiome3.

In postmenopausal women, declining estrogen levels lead to a reduction in Lactobacillus species, which are crucial for maintaining a healthy vaginal environment. This decrease is associated with increased microbial diversity and a higher vaginal pH, creating conditions that may promote inflammation and elevate the risk of infections4.

Understanding these transformations is crucial, as both the gut and vaginal microbiome play pivotal roles in maintaining overall health and well-being in older adults. By studying these microbial environments in individuals over 60, we aim to uncover insights that could lead to interventions promoting healthier aging..​

[1] https://www.nature.com/articles/s41575-022-00605-x , [2]https://pmc.ncbi.nlm.nih.gov/articles/PMC11087091/, [3]https://www.nature.com/articles/s44294-024-00050-y, [4]https://pubmed.ncbi.nlm.nih.gov/38713891/

Help to advance research on the microbiome factors that affect longevity.

Help to advance research on the microbiome factors that affect longevity.

Get gut or vaginal microbiome testing at a discount and gain personalized insights into how your microbiome changes with age. By participating, you'll help us uncover how the microbiome supports healthy aging and longevity in adults 60 and over.

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Am I eligible to participate?

Inclusion criteria

  • Adults are qualified for this study if they are at least 60 years old at the time of purchase.
  • Participants must be residents of the United States with US postal service

Exclusion criteria

  • None

Help to advance research on the microbiome factors that affect longevity.

Get gut or vaginal microbiome testing at a discount and gain personalized insights into how your microbiome changes with age. By participating, you'll help us uncover how the microbiome supports healthy aging and longevity in adults 60 and over.

Help to advance research on the microbiome factors that affect longevity.

Get gut or vaginal microbiome testing at a discount and gain personalized insights into how your microbiome changes with age. By participating, you'll help us uncover how the microbiome supports healthy aging and longevity in adults 60 and over.

How to join the study

If you are interested, please complete the survey. If you qualify for the study, you will be directed toward a special purchase link to order your gut or vaginal test at the discounted rate.

About Tiny Health

Tiny Health was created for mom and baby - but our vision is lifelong.

We started with a focus on a baby’s first 1,000 days, when the microbiome plays a critical role in shaping lifelong health. Today, we offer at-home gut and vaginal microbiome tests for the whole family—delivering personalized insights from infancy through the senior years.

Processed in a CLIA-certified lab using state-of-the-art shotgun metagenomic sequencing, Tiny Health tests reveal what’s growing in your microbiome and what actions may support a healthier balance. Our reports are built on cutting-edge research and translated into practical, evidence-based recommendations.Our mission is to improve health outcomes across generations through microbiome science. From the first 1,000 days to the last, we’re learning that key shifts in the microbiome often mirror major life stages—like puberty, menopause, and older adulthood.

These are the moments when the microbiome may be most responsive to support. That’s why we’re expanding our data and tools to better serve every stage of life.

Hands holding microbiome test tube with graphs showing immune strength and antibiotic resistance data

How does the Research Edition work?

Purchase the kits, take your sample, and complete the surveys.

Complete the qualification survey via the button on this page. Interested individuals will provide information including age, probiotic usage, and contact email.

If you qualify for the discounted kit, you will receive a link to purchase a Tiny Health Gut Health test at a discount.

Gut samples can be taken at home by using our swab method. Samples will be mailed in using a prepaid envelope provided with the kit.

You will fill out health history and sample surveys upon sampling.

Processed in a CLIA-certified lab and using proprietary technology, Tiny Health’s gut health test provides strain-level precision and a complete list of all microbes in the vaginal and gut microbiome including bacteria, fungi, virus, parasites, and archaea. Results will take 4-5 weeks to arrive.

Research Edition Details

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Receive gut test results approximately 4-5 weeks after sending your sample to our lab.

Every report includes a personalized expert note that is reviewed by a team of microbiome experts.

Tiny Health reports provide actionable and evidence-based recommendations aimed at improving health conditions and course-correct gut imbalances

The microbiome result report and action plan are a part of the regular Tiny Health Gut Test product and not associated with the research study.

How do we look at the microbiome?

High resolution analysis

We use shotgun metagenomics, a technology used in microbiome research. Make informed decisions with a comprehensive list of microbes found in your sample.

Functional insights

Through functional profiling, we tell you what microbes are present, how much of them are there, and what they’re actually doing.

Targeted suggestions

Get actionable advice tailored to your age and unique test results. Our at-home tests empower you with strain-level detail and precision science.

Your privacy comes first

We are dedicated to safeguarding your personal information at every turn and we will never sell your personal information.  Your data is encrypted with high security standards to ensure complete confidentiality.

CLIA & CAP certified lab

Your samples are processed at a U.S. clinical-grade lab to ensure the accuracy, reliability, and timeliness of test results.

Meet our supporters:

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Medical Advisors

Dr. Emeran Mayer, MD
Medical Advisor

Executive director, G. Oppenheimer Center for Neurobiology of Stress and Resilience, UCLA; Author of The Mind-Gut Connection

Rodney Dietert, PhD
Scientific Advisor

Professor Emeritus of Microbiology & Immunology, Cornell University

Ruben Mars, PhD
Founding Advisor

Ruben Mars is an Assistant Professor of Medicine at Mayo Clinic in Rochester, Minnesota.

Nicole Calloway Rankins, MD, MPH
Medical Advisor

Medical Advisor; Practicing OB/GYN Hospitalist Physician, Creator and Host of The All About Pregnancy & Birth Podcast

Meghan Azad, PhD
Scientific Advisor

Associate Professor of Pediatrics and Child Health at the University of Manitoba; Co-Director, Manitoba Interdisciplinary Lactation Center (MILC); Deputy Director, CHILD Cohort Study

Dr. Kim Green, MD
Medical Advisor

Associate Clinical Professor, UCSF; Pediatrician and former Chief Innovation Officer, Kaiser Permanente

Joel Warsh, MD
Medical Advisor

Board-Certified Pediatrician, Creator of Raising Amazing Podcast

Ana Santos Almeida, PhD
Scientific Advisor

Instituto de Medicina Molecular Faculty of Medicine, University of Lisbon

Noel Mueller, PhD
Scientific Advisor

Associate Professor of Epidemiology, Johns Hopkins University

Interested? Join this study

If you are interested, please complete the survey. Qualified individuals will be contacted by the study coordinator to provide consent and enroll in the study.

Frequently Asked Questions

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