Longevity Medicine 3.0 for 40+
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OUR FOUNDER
After 15 years in emergency medicine, I saw what happens when we wait. I built Eternaal Health to change that. An advanced longevity practice designed for people who want control, not prescriptions.
Medicine 3.0 is prevention-focused. We target the real causes of decline—cardiovascular disease, metabolic dysfunction, cancer, and cognitive loss and address them long before symptoms appear.
I started with my own data: genetics, epigenetics, VO₂ max, DEXA, CGM, and Advanced Longevity Labs that most primary care physicians never order. The results transformed my health trajectory.
Now I help clients do the same. Measure what matters, act on it, and sustain it for life. My mission is simple: build a clear, data-driven plan that helps you live longer and stay stronger.
Joseph A. MacLellan M.S., M.A.,
ABAAHP, PA-C, Author, Founder
The Pursuit of Ultimate Longevity for 40+
Here's How You Take
Control of Your Health.
Know your data. Without it, you’re just guessing.
Understand the biomarkers that actually matter (V02max, DEXA, Advanced Blood Work, CGM, Prevention testing).
Interpretation and Insight into your body turns intention into action. This is the foundation of real and lasting change.
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Elite VO₂ max slashes your risk of death by 80%¹
Genetics only accounts for only 25% of lifespan; the rest is modifiable.²³⁴
Up to 45% of cancers are preventable with modifiable behaviors.⁵
THE CORE 4
Prevention & Longevity Based Practice
Diet
Sleep
Exercise
Connection
DISCOVER YOUR OPTIMAL HEALTH
Test, Track & Improve.
Personalized health starts with data. Through our three-tiered testing programs, we help you uncover what’s really going on inside your body. Your genetics, metabolism, biological age, inflammation, and more.
Testimonials
What Clients are Saying about Us.
After more than a decade practicing Emergency Medicine, I thought I
understood health until I went through Joe’s Eternaal Health program. The precision testing and data interpretation revealed what truly drives longevity. The VO₂ max, DEXA, and advanced blood analysis reshaped how I train and manage my health. My key markers have already improved, and I feel better than I have in years.
“Joe’s approach is the future of medicine. It's proactive, data-driven, and built around measurable results.”
— Neil Perera, Emergency Medicine MD
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Testimonials
What Clients are Saying about Us.
“My labs always came back ‘normal’ with my primary care doctor, but I knew something was missing. This program goes beyond basic labs. It’s advanced, preventative care. With deeper testing and personalized guidance, I’ve lost 15 pounds, my energy is higher than ever, and my nutrition, training, and daily habits have all been fine-tuned.
Emily F. - 48, Goal - Longevity
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Testimonials
What Clients are Saying about Us.
"I completed the executive-level program that included genetics, blood work, VO₂ max testing, DEXA scans, and even a full-body MRI. While my VO₂max was great, my cholesterol and visceral fat levels were concerning. This experience was both eye-opening and motivating.
As a result, I now have more energy, a sharper mind, and genuine confidence in the direction of my health. This is what modern prevention should look like. Everyone should do this!"
Mike K.
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Testimonials
What Clients are Saying about Us.
“I have been teaching yoga for over 20 years and thought I understood my body well. However, genetic and epigenetic testing revealed insights I never could have imagined.
This preventative testing, analysis and interpretation of my own data, transformed my perspective on health. There is so much information out there today. This approach has helped me identify the key areas I need to prioritize and focus on — those that truly impact my health and longevity. If you are considering this program, I highly recommend it."
Kristen S.
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REFERENCES
Mandsager K, Harb S, Cremer P, et al. Association of cardiorespiratory fitness with long-term mortality among adults undergoing exercise treadmill testing. JAMA Netw Open. 2018;1(6):e183605. doi:10.1001/jamanetworkopen.2018.3605 MedlinePlus Genetics. Is longevity determined by genetics? National Library of Medicine. Updated July 11, 2022. https://medlineplus.gov/genetics/understanding/traits/longevity/ Sebastiani P, Perls TT. Human longevity: Genetics or lifestyle? It takes two to tango. Curr Genomics. 2016;17(4):349-361. doi:10.2174/1389202917666160426143146 Herskind AM, McGue M, Holm NV, Sørensen TIA, Harvald B, Vaupel JW. The heritability of human longevity: A population-based study of 2872 Danish twin pairs born 1870–1900. Hum Genet. 1996;97(3):319-323. doi:10.1007/BF02185763 Islami F, Goding Sauer A, Miller KD, et al. Proportion and number of cancer cases and deaths attributable to potentially modifiable risk factors in the United States. CA Cancer J Clin. 2018;68(1):31-54. doi:10.3322/caac.21440