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Calculating Your Quiz Result:

We are processing your quiz results against 5 key pillars of human health-span
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Cardiovascular Health
Cognitive Performance
Flexibility & Mobility
Sleep Health
Strength & Muscle Mass
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Your Quiz Result: 0 / 100
What does this mean?
A quick indication of whether your lifestyle is on track.
100-80
You are in fantastic health, your lifestyle is highly optimized.
79-60
Above average performance, however there is a lot to improve
59-40
Below average health optimization. Lifestyle changes now will make a big impact on your longevity.
39-20
Your lifestyle needs a lot of attention for you to reduce your likelihood of preventable age related disease.
19-0
You are in the bottom 20% of the US population. Let's fix this.
Find your exact Functional
Age and how to reduce it.
Discover Now
Join the Longevity Revolution
2 in 3 discover they are aging faster than expected.
Why Test Functional Age?
Validated Biomarkers of Aging
25 Biomarkers of health-span and ifespan, validated in 300 peer reviewed clinical trials
Personalized Recomendations
Improve your healthy lifespan with targetted recommendations based on your unique biology
Longevity Clinican in your pocket
In app, guidance support and tracking to coach you through your longevity protocol
Functional Age - the age your body & brain are currently performing.
System Deep Dive - analysis of your body systems and how they are impacting your healthy lifespan.
Personalized Protocol - the Zest App will generate personalized lifestyle recommendations to lower your rate of aging.
Longevity Research - Opt in for free and participate in the Zest & Cambridge University research partnership through the ENHANCE studies.
Total
$289 $199
You save 32%
60 - Day Money-Back Gurantee
Full refund if you aren't satsified. No questions asked.
One time purchase
No lock in contracts.

Stories from the Zest Community

Howie Mandell: @howiemandell
Howie Mandell: @howiemandell
“.. a unique approach to aging that your future self will thank you for..”
Emily Loss: @wildgrownwellness
Emily Loss: @wildgrownwellness
“.. the only longevity test with brain, body and physical fitness.. .”
Jennifer Kirk: @thehappy maverick
Jennifer Kirk: @thehappy maverick
“.. Optimizing my health as I get older is my number one priority. .”
Kiki Magunnson: @livingwellwithkiki
Kiki Magunnson: @livingwellwithkiki
“.. I am a huge believer in blood based tests for guiding progress .”
Alejandra Ruff @livingwellco
Alejandra Ruff @livingwellco
“.. the only longevity test with brain, body and physical fitness.. .”
Cameron Kirkpatrick: @ckirkpatrick1
Cameron Kirkpatrick: @ckirkpatrick1
“.. I improved my Functional Age in 3 months by changing my exercise plan .”
Roby Brown
Roby Brown
"I didn't realise my apoB and HDL were high, I better watch out for that!"
Eliza Holt @Lizhol
Eliza Holt @Lizhol
“.. personalized recommendations based on my results made improving my score feel achievable! ”
Carly Williams @carly18
Carly Williams @carly18
“.. This test uncovered areas I never thought to address, like sleep quality and recovery.”
Josh Swy @josh88
Josh Swy @josh88
“.. Personalized recommendations to keep me on track 10/10. .”

How to Test Functional Age?

Step 1:
Complete your home blood testk it, post this back to our lab.
Step 2:
Download the Zest app, complete your brain function and physicalexam.
Step 3:
Receive your result and personalized protocol
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What Metrics do we test?

Sequence Memory
Cognitive Performance
Blood Biomarkers
Physical Performance
Digit Span Memory
Digital Biomarkers
Cardiac Health
Functional Fitness

Frequently Asked Questions

Your kit includes everything you need to collect a small blood sample at home, safely and easily. Inside you’ll find a lancet, collection cards, alcohol swabs, bandages, and a pre-paid return envelope. No lab visits, no hassle.

Once your blood sample is returned, we analyze key biomarkers linked to aging and combine them with data from your wearable devices and in-app functional performance tests. Our machine learning algorithm calculates your Functional Age a snapshot of how old your body really is compared to your chronological age. We also provide a peronsalized protocol for you to improve your scores.

Zest blood tests anlayze clinically relevant blood biomarkers including:

Inflammation: CRP
Metabolic health: HbA1c, fasting glucose, triglycerides
Cardiovascular risk: LDL, HDL, ApoB
Liver & protein status: Albumin
Hormones (for men & women): Testosterone, Oestradiol, SHBG, DHEAS

We recommend retesting every 3 to track your progress, assess what’s working, and update your personalized protocol. Functional age is dynamic, and improvements are often visible within just a few months of following your plan.

All of your results, scores, and recommendations are delivered in the Zest app. You’ll get a breakdown of your Functional Age, biomarker analysis, and a tailored plan covering supplements, training, recovery, nutrition, and sleep.

Zest offers targeted longevity supplements designed to support the areas that impact your biological age the most, such as cellular energy, inflammation, brain health, and hormone balance. Your personalized protocol will recommend the right supplements based on your test results.

Still have a questions?