You're not imagining it.Something triggered your Hashimoto's.

We help you figure out why your immune system attacked your thyroid.

Built by scientists and clinicians from

NIH Harvard Stanford Mount Sinai NYU Duke

Genes load the gun. Exposures pull the trigger.

A lifetime of exposures interacts with your genes and shapes your health: infections, pollution, stress, medications, and thousands more. Together they are your exposome — and could hold the answer to why you got sick.

Discover your expotype.

EXPIN maps the links between your exposures and your illness, grounded in peer-reviewed research. The result? A deeply personalized foundation for better care and peace of mind.

Find my why

Tell us your story.

We ask the questions your doctor doesn't have time to. A guided interview maps your background, medical history, environment, the products you use, and daily habits, building a complete picture of your exposures.

Do you typically consume soy products?

yes, I'm a vegetarian and rely on tofu and other meat substitutes for protein

How frequently are you eating tofu or other soy-derived substitutes?

probably 3-4 times a week

We hunt for signals.

EXPIN searches your story for patterns that link exposures and disease, surfacing even non-obvious connections that are backed by scientific studies and environmental data.

Get your report.

Review your personalized expotype report: a foundation for precision testing, treatment, and prevention strategies.

See it in action

Climb out of the rabbit hole.

EXPIN is for patients who are…

Frustrated by unproductive conversations at the doctor's office
Tired of endless Reddit threads, influencer reels, and conflicting advice
Ready for science-based answers

Learn about the science

Built by scientists, not internet personalities.

We are experts who have pioneered environmental health, diagnostics, and biophysics. Current and former roles at Harvard, Stanford, Duke, University of Southern California, National Institute of Health, Mount Sinai, and NYU.

Krisna Bhargava

PhD

Seasoned founder.Scientist.Product innovator.
Jonathan Freedman

PhD

Toxicologist.Environmental exposure expert.
Uta Guo

MD, MBA

Physician.Professor.Researcher.
Leonardo Trasande

MD, MPP

Environmental health and pediatrics.WHO advisor.
Richard Goldstein

MD, PhD, MHCM

Healthcare management.Endocrine surgeon.Clinical investigator.
Robert (Bob) Molinari

PhD, MBA

Biotech and genomics pioneer.Innovator.
Kuljeet Rai

MD

Personalized medicine.Clinical investigator.
Quinto Gesiotto

MD, MS

Hematologist.Oncologist.