Daily energyEveryday energy
See how efficiently your cells are producing the energy your day depends on.
Over 70%of U.S. adults report feeling very tired or exhausted on at least some days.1
mescreen™ gives you the power to track and optimize yours.
A few drops of blood, a lab analysis of your mitochondrial function, and a one-on-one expert consult.
$699 + shipping. Kit, lab analysis and expert consult included.
Mitochondria generate more than 90% of your body's energy,2 turning the food you eat and the air you breathe into ATP, the energy every cell runs on. mescreen™ measures how well that process is working, so you can bring real data into your wellness decisions.
Daily energySee how efficiently your cells are producing the energy your day depends on.
RecoveryUnderstand how your cells respond when energy demand goes up.
FocusYour brain is one of your most energy-hungry organs. Know your cellular baseline.
Healthy agingRetest as your routine changes and compare against your own baseline.
core mitochondrial functions are measured from a single at-home blood sample, then summarized in four plain-language report areas.3
Your home collection kit arrives within 7 days, with a step-by-step booklet and a prepaid return package.
Register your kit and complete your questionnaire online, following the steps included in your booklet.
Collect a few drops of blood at home in under 10 minutes. Be sure to write your name and date of birth on the blood card. Then mail your sample back.
The laboratory analyzes your sample, and your results are generally ready 2–3 weeks after it arrives.
Review your results with a mescreen™ mitochondria expert. Many people retest every 3–4 months while adjusting their plan.
Your mescreen™ report turns lab measurements into plain language, with personalized lifestyle, nutrition and supplement ideas to discuss with your provider.
Most tests look at your genes or a single marker. mescreen™ looks at how your mitochondria are working right now.
| Approach | What it shows | Keep in mind |
|---|---|---|
| mescreen™Functional cellular testing | How your mitochondria currently perform, from an at-home blood sample | A newer approach and an active area of research |
| Genetic and epigenetic tests | Inherited traits and biological-age estimates | Doesn't measure your current energy production |
| Single blood markers | Circulating signals related to metabolism and stress | Indirect, and can shift with diet, activity or inflammation |
| Muscle biopsy | Energy production measured directly in tissue | Invasive, costly, and done in a clinical setting |
No subscription needed and no hidden lab fees. Your kit, prepaid return shipping, lab analysis, report and expert consult are all in one price. Subscription option to save on retests.

No prescription needed · Not covered by insurance· Refund policy
★★★★★“It was easy to do and the consult with Dr Grace was clear, concise and informed me what is going on in a comprehensive and understandable manner. She distilled what is a very complex and sciency subject to layman’s language…”
Sue B. · Verified buyer · May 2025
★★★★★“I thought the process was pretty easy. My order came quickly, the instructions were clear, and the finger prick for blood was not bad.”
Matthew O. · Feb 2025
★★★★★“I’m very satisfied with the experience. The results gave me clear insights… The verbal explanation that accompanied the results was also very helpful and easy to understand.”
Jeroen M. · Verified buyer · Nov 2025
★★★★★“…speaking with Dr. Lovejoy (LOVE her name), I gained great understanding about the test itself and what each of the categories mean.”
Jamie H. · Verified buyer · Aug 2025
★★★★★“The consult was really helpful and the results are interesting.”
Tess F. · Verified buyer · Oct 2025
★★★★★“Awesome experience! We will definitely put the great advice to work and repeat the test in a few months!”
Lynn D. · Verified buyer · Jul 2026
Excerpts from customer reviews on the mescreen™ website, collected through Klaviyo Reviews. Shown for comments on the testing process; individual experiences vary.
Mitochondria are tiny structures inside almost every cell in your body. They turn the food you eat and the oxygen you breathe into ATP, the energy your cells run on. A single cell can contain hundreds to thousands of them.
Almost everything your body does, from moving and thinking to recovering after a workout, runs on cellular energy, and mitochondria produce most of it. They also help manage oxidative stress and support communication between cells, so how well they work plays a big part in how energized you feel day to day.
Most routine blood tests look at markers circulating in your blood, not at how your cells actually make energy. mescreen™ looks at mitochondrial function directly, giving you a personal baseline you can track over time as you adjust sleep, nutrition, exercise or supplements with your provider.
Age, sleep, physical activity, nutrition, stress and overall lifestyle can all influence how efficiently your mitochondria work. That's why many people retest after making changes, to see how their cellular energy responds.
mescreen™ is for adults who want to understand their cellular energy, set a baseline to track over time, or see how lifestyle changes show up at the cellular level. Healthcare practitioners also use mescreen™ with their patients.
Many wellness tests look at genetics, hormones or general biomarkers. mescreen™ measures how your mitochondria are actually functioning, then pairs your report with a one-on-one consult so you understand what your results mean.
mescreen™ measures 13 core aspects of your mitochondrial function, meaning how well your cells produce and manage energy, from a small blood sample. Your results are summarized in four report areas and reviewed with you in a one-on-one consult.
No. mescreen™ is for general wellness and informational purposes only. It isn't intended to diagnose, treat, cure or prevent any disease, and it has not been reviewed by the FDA. Talk with your physician before changing medications, diet or exercise.
Your sample is analyzed in a laboratory using scientific methods from published NASA research, and every result goes through laboratory validation and quality checks before your report is released. mescreen™ is a wellness test, not a diagnostic test, so your results are best used as a baseline you track over time and discuss with your provider.
No prescription is needed to order a mescreen™ test.
Your kit should arrive within 7 days of your order. Collection takes under 10 minutes. Once your sample arrives at the laboratory, results are generally ready within 2–3 weeks.
The at-home collection takes less than 10 minutes and is simple to complete.
You’ll receive your comprehensive results and mescore™ within 2-3 weeks of our lab receiving your sample.
A 20-minute one-on-one session with a mescreen™ expert who explains your results and provides personalized recommendations.
No. mescreen™ is not covered by insurance.
When you're starting or adjusting a plan with your practitioner, retesting every 3–4 months is common. Once your plan is settled, many people test every 6–12 months.
Your individual results stay private to you. We don't sell your test results or use them for advertising, and you decide who else sees them, such as your own provider. See our Privacy Policy for details.
Delivered vs. Received
There is typically a delay between the time a sample is marked as "delivered" on the tracking information and the time it is scanned as “received” by the lab. Occasionally, this delay can take up to 2 weeks. A kit is marked as “received” by our system when it is physically opened at the lab and the kit barcode is scanned - this process is referred to as accessioning.
It is not unusual for kits shipped at the same time to be received at the lab at different times. You will receive an email when our laboratory completes the accessioning process and scans your kit barcode. The status of your sample will also update on your profile homepage.
If the laboratory receives a sample kit that has not yet been registered to an account, the kit barcode and registration instructions will be sent to the email address associated with the order.
Physicians and wellness practitioners use mescreen™ to add a functional, cellular view to the conversations they already have with clients.
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