Our story
Eight years of printouts, and nobody to read them.
Our founder, an endocrinologist, watched patients spend years chasing an explanation for the same symptoms. Each year brought another panel, another printout and another visit too short to make sense of it.
Running the tests was never the hard part. Reading them was. So in 2018 we opened Tinsdale in Back Bay on the opposite idea: run the markers that change a decision, have a physician read them against optimal ranges, and answer in plain English.
Eight years later, that is still the whole company: three labs and a network around them, doctors who explain things, and software that keeps the plan going between visits.
110+
Biomarkers in the full panel
48h
Typical time to results
120+
Partner draw sites
9,000+
Members tested since 2018
What we stick to
Three rules we haven’t bent once.
Only test what changes a decision
Longer panels are easy to sell and seldom useful. We run the markers that would change what you do next, and tell you when one wouldn’t.
Explain it in plain English
Each report is written so you understand it on the first read. No wall of reference ranges, no jargon that needs another appointment.
Tell you when you don’t need us
If your numbers look good, we say so and send you on your way. Retesting healthy people every quarter is a sales tactic, not medicine.
Inside Tinsdale
This is what lab testing feels like when someone is paying attention
No line out the door at 7am, no printout you can’t follow. A calm draw, a physician who reads it properly, and a plan that fits your life.
Time to ask questions
Food first, pills second
Training you’ll keep up
The doctors reading your results
Board-certified physicians, each one reviewing the panels that match their specialty.
Dr. Claire Whitfield
Endocrinologist
MD · Hormones & metabolism
Dr. Rohan Desai
Internal Medicine
MD · Leads preventive care
Dr. Ines Carvalho
Cardiologist
MD · Heart & lipid panels
Dr. Owen Gallagher
Longevity Medicine
DO · Strength & recovery
Dr. Grace Liu
Hematology
MD · Iron, ferritin & low energy
Dr. Rachel Adler
Family Medicine
MD · Yearly baselines
Dr. Danielle Pierre
Nutritional Medicine
MD · Nutrients, gut & absorption
Dr. Kwame Mensah
Sports Medicine
DO · Endurance & recovery
How we got here
2018
Tinsdale opens in Back Bay with one panel, one doctor and a rented draw room.
2020
The Kendall Square lab opens; results move from PDFs to a member dashboard.
2023
Coolidge Corner opens, and physician-signed plans turn panels into monthly steps.
2026
120+ draw sites, six panels, and 9,000 members who retest on their own schedule.
From our founder
“The point was never to find something wrong. It’s to stop you guessing.”
— Dr. Claire Whitfield, founder
Begin with one panel.
Choose a test, book the lab nearest you, and have a doctor’s read in 48 hours.
FAQ
Questions,
answered.
What people ask most about testing, results and plans. Tap any question to read the answer.
Still have questions?
Our Boston care team answers messages within a few hours.