Order a blood test online, get drawn at a local lab, and see 140+ biomarkers (measurable clues about your heart, hormones and metabolism) explained in plain language.
You get your blood drawn at a local lab. We measure 140+ biomarkers, then explain every result in everyday words, with no medical degree needed. It is a way to see how your body is doing before something feels wrong.
What is a biomarker?
Cholesterol, blood sugar, vitamin D and thyroid hormones are all biomarkers. Each one is a number that shows how a part of your body, like your heart, metabolism or hormones, is doing right now.
Why track them?
Many changes in your body build quietly for years before you feel anything. Testing again over time shows which way your numbers are heading, so you can notice a shift early instead of after symptoms start.
What could change?
Sleep, food, exercise and stress all show up in your blood. With results explained in plain language, you can see what is on track, what is worth a closer look, and what to bring to your doctor.
Zaro provides information, not medical advice or diagnosis. Talk with your doctor about your results.
No waiting rooms. No referrals. No insurance hoops. Order online, get a quick blood draw at a nearby lab, and get results that actually make sense. Connecting a wearable is optional.
See the full process
Pick Surface, Signal, or Source based on how deep you want to go. FSA/HSA accepted.
Visit a compatible Quest location near you. Labcorp and BioReference are coming soon. New York and New Jersey are coming soon, and Rhode Island is not currently supported.
Results are ready in 5–7 business days, delivered to the Zaro app with plain-language explanations.
Your results become one 0–100 score across 7 areas of health, updated every time you test.
Your results are combined into a single 0–100 Zaro Score across 7 health domains, with a plain-language explanation of every biomarker behind it.
Bloodwork starts it
Your first panel produces your Zaro Score. No wearable needed.
Wearable is optional
Connect one later and your daily signals are read in alongside your labs.
Sample output
Illustration only. Your Zaro Score reflects your own results.
Your body has been sending signals for years. A standard checkup reads a handful of them, once a year. Zaro reads more than 150, alongside what your wearable sees every day, so you can act while change is still easy.
Zaro brings together your bloodwork, wearable signals, and lifestyle into one living number, then shows how that number compares to your peers and changes over time.
Sample output · your score reflects your actual data
Biological Ages
Biological Age
5 YRS YOUNGER
PhenoAge Model
Heart Age
3 YRS OLDER
AHA PREVENT
Exclusive to Signal and Source panels
Wearable signals
Synced from Apple Health
300+ compatible devices supported
How You Compare
Better than 72% of people aged 35–40
Based on anonymized aggregate data within the same age group
Score Over Time
No generic advice. Zaro turns each out-of-range marker into a small, specific change, then checks in until it sticks.
Food
Protein first, fewer refined carbs
Because: Fasting insulin trending up
Movement
Zone 2 cardio, three times a week
Because: VO₂ max 52
Sleep
Seven to nine hours, same time nightly
Because: HRV 58 ms
Supplements
Magnesium glycinate, 400 mg
Because: Low RBC magnesium
Most platforms hand you a report and hope you read it. Zaro’s engine pair turns your biomarker data into a daily action plan that follows up with you until behaviour actually changes.
Every recommendation is tied directly to a specific marker in your blood. No generic advice, no guesswork. Only what your biology actually needs right now.
Updated after every panel run, prioritized by impact
Zaro’s adaptive notification engine does not just send reminders. It observes your responses and notifies you differently based on your behaviour, asking targeted follow-up questions until the actual blocker is resolved.
Good morning. Time for your Omega-3. Did you take it with breakfast?
Adaptive follow-up triggered by "Not yet"
Adapts based on your response, every single time
Test once. Improve continuously.
“The gap between knowing and doing is where health fails. Zaro adapts to user routine and check-in based on user behaviour.”
Retest twice a year
One record of you, getting clearer every time you test.
Each panel updates your Zaro Score across seven health domains, so you can see what changed, why, and what to do next.
Explore the panelsNo one in the market has packaged blood testing like this. Our cascade model moves from what has gone wrong, to what is developing, to the root causes beneath it all.
Has something already gone wrong?
101+ markers · the foundation
A foundational snapshot of your health today. Surface measures the core markers standard medicine looks at in a routine physical, so you have a clear baseline of where you stand today.
Covers
Heart · Metabolic · Blood · Kidneys · Liver · Electrolytes · Thyroid · Nutrients
Is something developing?
Includes everything in
Everything in Surface, plus deeper markers that show how your numbers are trending.
Covers
Heart · Metabolic · Blood · Kidneys · Liver · Electrolytes · Thyroid · Nutrients · + Hormones · + Stress
What root causes?
Includes everything in
Everything in Signal, plus the upstream markers that explain why your body performs the way it does. Source measures thyroid antibodies, coagulation, inflammation and omega-3 markers — and unlocks your Biological Age and Heart Age scores.
Covers
Heart · Metabolic · Blood · Kidneys · Liver · Electrolytes · Thyroid · Nutrients · Hormones · Stress · + Immune · + Brain
Dr. Rena Malik is a board-certified urologist and pelvic surgeon with 2.9M+ YouTube subscribers. Her new book, The Hard Truth, is a science-backed guide to testosterone, heart health and longevity. See the Zaro panel she recommends for the numbers behind it.
Paid partnership with Dr. Rena Malik, MD.
Zaro connects with 300+ devices, syncing your sleep, HRV, activity, and continuous glucose data alongside your lab results.
FSA / HSA
You have been setting aside pre-tax money in your FSA or HSA for years. Most people wait until something goes wrong to spend it. Zaro lets you use it differently: comprehensive testing is an eligible way to put those pre-tax dollars toward understanding your health, with a clear baseline to share with your doctor.
Every Zaro panel is currently processed at CLIA-certified Quest Diagnostics facilities — the same labs behind your physician-ordered tests. Labcorp and BioReference are coming soon.
Begin with one draw
Choose a panel, schedule your blood draw, and get answers that actually explain what is happening inside your body.
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