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

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

Map my triggers
Her exposures: Hairspray contains carcinogens; Thyroid disruptors in sunscreen; Hormone-disrupting fragrances; Grew up near pesticide-heavy golf course; 40+ flights per year for work. Natalie, 32 Diagnosed at 29. TSH normal, still tired all the time.

Built by scientists and clinicians from

NIH Harvard Stanford Mount Sinai NYU Duke

How it works

  1. Step 1:Tell us your whole story.

    Work with our science team to understand your medical and exposure history.

  2. Step 2:Show us your cabinets.

    Share the products you use every day, from supplements and medication to cosmetics and cleaning sprays.

  3. Step 3:We map your exposome.

    Our analysis screens thousands of potential links between your exposures, disease, and symptoms based on state-of-the-art scientific understanding.

  4. Step 4:Discuss with a scientist.

    Consult with an environmental health expert to understand your report and potential next steps.

  5. Step 5:Work with your doctor.

    Your expotype report can help your physician consider precision treatment strategies. Share it with them easily.

See what EXPIN members have to say.

I appreciate that EXPIN brings together the different pieces of your life, using questions not normally asked by your doctor, and connects those pieces with scientific evidence to paint a picture of your disease origin and triggers, in a simple and straightforward way.

I've spent the last 20 years wanting to understand my health. I get bloodwork twice a year, I have had rounds of genetic testing to learn what my children and I might be predisposed to. But my genes and my labs were only ever telling me part of the story… Then I found EXPIN, and it felt like finding the missing piece.

EXPIN is able to tell me which exposures I actually need to think through, and which I don't need to worry about at all. There is true relief in that — being told, with evidence, where to focus and where to let go.

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.

Understand the science

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

Built by scientists, not internet personalities.

EXPIN is for patients who are…

  • Frustrated by unproductive doctor's visits
  • Tired of doomscrolling Reddit threads and conflicting guidance
  • Ready for science-based answers

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.

Uta Guo

MD, MBA

Quinto Gesiotto

MD, MS

Leonardo Trasande

MD, MPP

Kuljeet Rai

MD

Richard Goldstein

MD, PhD, MHCM

Krisna Bhargava

PhD

Jonathan Freedman

PhD

Robert (Bob) Molinari

PhD, MBA

Learn more about our team

Chronic illness meets cutting-edge support.

For most people, it takes less than an hour to change their status quo.

Get my expotype

EXPIN is a research and educational tool for understanding what may be driving your condition. It is not a medical device, and it does not diagnose, treat, or cure disease. It works best alongside your doctor, and is never a substitute for professional medical care.

*Natalie is an illustrative story, not a real member.

© 2026 The Exposome Intelligence Company