Tiny Health's story begins withtwowildly different births.

Cheryl Sew Hoy had two radically different birth experiences between her children. Her first baby presented breech and was born by C-section. Two years later, her youngest was a vaginal birth with the support of a midwife.

Medical professionals in surgical attire assist in a C-section birth, with one doctor holding a newborn. Monitors and equipment are visible in the background.Diagram comparing microbiome sources: skin/environment (unfriendly, pink/orange) versus Cheryl (beneficial, green/orange) in a circular visualization.
A family celebrates a vaginal birth, with a mother lying in bed holding a newborn, a father smiling closely, and an older sibling looking on with curiosity.Circular microbiome diagram showing mixed bacteria from skin/environment (unfriendly) and from Cheryl (beneficial), with green and orange dots distributed throughout.
Diagram comparing microbiome sources: skin/environment (unfriendly, pink/orange) versus Cheryl (beneficial, green/orange) in a circular visualization.Medical professionals in surgical attire assist in a C-section birth, with one doctor holding a newborn. Monitors and equipment are visible in the background.
A family celebrates a vaginal birth, with a mother lying in bed holding a newborn, a father smiling closely, and an older sibling looking on with curiosity.Circular microbiome diagram showing mixed bacteria from skin/environment (unfriendly) and from Cheryl (beneficial), with green and orange dots distributed throughout.

Guess which baby battled eczema and food allergies?

Cheryl’s first baby developed mild eczema and had to work through a sesame allergy after starting solids. This wasn’t a coincidence. Her baby had been exposed to a lot of unfriendly bacteria from the c-section...

And the consequences were showing.

After reading hundreds of scientific papers....

Cheryl found ways to restore her first child’s gut microbiome health, hopefully averting chronic conditions. She tried with:

However, back then gut tests were only available for adults. There was nothing tailored to mom and babies needs. So Cheryl was left without any way of measuring how her baby's microbiome was recovering.

Determined to find answers, Cheryl met a microbiologist who opened her eyes to all the ways you can improve your child's health by deeply understanding their microbiome.

How was this not available to parents? To babies struggling with fussines, eczema or asthma? That needed to change.

So, Cheryl put together a team of leading scientists, physicians and microbiologists and after a year of working the problem, Tiny Health was born.

“I took charge of my own and my babies' gut health, because I knew it was fundamental for their lifelong health.”

Portrait of Cheryl
Cheryl, Founder of Tiny Health

Introducing the first microbiome tests uniquely designed for families

Vaginal test for mom

Keep your vaginal health in check to ensure you pass friendly bacteria to your baby at birth, and lower risk for pregnancy conditions.

Gut test for mom or dad

Discover if you have the microbes essential for your baby’s immune system and if you are able to pass them on.

Gut test for baby

The first colonizer bacteria can tell if baby had the right start. 3m, 6m, 12m are also important biomarkers to track as their gut rapidly evolve.

Stack of Tiny Health boxes with a slogan, a baby bottle, and wooden toys.

Our mission:
To improve health outcomes of future generations through evidence-based insights

“Tiny Health is THE microbiome test that all families should do. Knowledge is Power. And no matter where you are on your health journey, it’s never too late to get your gut microbiome in order!”

Dr. Elisa Song

Chief Medical Officer at Tiny Health
Stanford-, NYU-, UCSF-trained integrative pediatrician and pediatric functional medicine expert
A portrait of Dr Elisa Song. A woman smiling to the camera with her arms crossed.

Built by a team who cares

Who’s on our team: microbiologists, pediatric physicians, science writers, technologists, bioinformatician, data scientist, wellness expert, lactation consultant, registered dietician, pediatric acupuncturist, and more. We have 28 babies and kids, 14 cats and 25 dogs, 6 chickens, 208 plants, 1 dragon and 1 hamster. Collectively, we have read 1,587 scientific papers.

Dr. Elisa Song Chief Medical Officer at Tiny HealthKatie KempfAnnelise Hillmann, a young woman with long, dark hair, is smiling at the camera against a yellow background.Star Edwards, a woman with long, wavy brown hair and earrings, is smiling at the camera against a yellow background.Noelle AcostaClaudia NakamaJulian Trachsel, a man with curly hair, is smiling at the camera against a yellow background, wearing a gray sweater.Mollie SteinHannah GoeringMonica Bossinger, a woman with long, blonde hair and glasses, is looking thoughtfully at the camera against a yellow background.Sara TateRitika KhilnaniLeandro SueroNabeel ImamHarold BurgosShawn ParentDanielle TanGemlyn Binsol, a woman with shoulder-length dark hair and glasses, is smiling at the camera against a yellow background.Faith LansanganGrace CordeneteJessica May LabillesMichael CabericNice PoculanTrisha Baron
We’d love to hear from you about our current open positions.
View open roles

Developed with experts in early-life microbiome health

Noel Mueller, PhD
Scientific Advisor

Associate Professor of Epidemiology, Johns Hopkins University

Joel Warsh, MD
Medical Advisor

Board-Certified Pediatrician, Creator of Raising Amazing 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

Nicole Calloway Rankins, MD, MPH
Medical Advisor

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

Ruben Mars, PhD
Founding Advisor

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

Dr. Kim Green, MD
Medical Advisor

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

Rodney Dietert, PhD
Scientific Advisor

Professor Emeritus of Microbiology & Immunology, Cornell University

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

Joel Warsh, MD
Medical Advisor

Board-Certified Pediatrician, Creator of Raising Amazing 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

Nicole Calloway Rankins, MD, MPH
Medical Advisor

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

Ruben Mars, PhD
Founding Advisor

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

Dr. Kim Green, MD
Medical Advisor

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

See all advisors