Join the Longevity Revolution

Elevate your health with the world's most advanced longevity supplement and your personalized longevity guide
tailored just for you

Our Research Partners

Our Longevity Solutions

Our Longevity Solutions


Starting at
Premium Supplement Blend
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  • 10 highly effective ingredients
  • Targets all 9 Hallmarks of aging
  • Look and feel younger
  • Boost energy, mood, cognition, and overall wellbeing
  • Created by leading researchers and based on 400+ studies
Learn more


Starting at
Ultimate Longevity Guide
Get Started
  • Science based longevity guide to slow down biological aging
  • Longevity recipes and nutrition
  • Fitness plan tailored to you
  • Analysis of your lifestyle and ongoing support from experts
  • Look and feel younger and stronger
Learn more

How it works

How it works

How it works

How it works

Step 1


Get an in-depth evaluation of how your current lifestyle impacts your aging process.

Step 2

Your Guide

Receive a science-backed, personalized longevity plan tailored to your needs

Step 3

The Supplement

Get our best-in-class supplement, developed by leading researchers and backed by hundreds of studies.

Step 4

Ongoing Advice

Receive continuous expert support on your longevity journey, ensuring you're well-equipped to reach your health goals.

Unlock your longevity

Your diet, exercise, and supplements play a significant role in determining your rate of aging. With the proper support, you can preserve a youthful and healthy body.

Take control of your aging process with Extensia.
Our comprehensive, science-based solutions include personalized longevity plans and cutting-edge supplements. Enhance your body's natural ability to combat aging, feel younger, and enjoy life to the fullest.

Discover the Benefits

Discover the Benefits

Our solutions are designed to fight the visible and invisible signs of aging, enabling you to look and feel
younger for longer.

Energy Levels

As we age, our energy levels naturally decline. Our solutions include specific foods and exercises in your personalized guide that aim to increase your vitality. We also include natural compounds such as NMN in our supplement blend that boost your NAD+ levels, returning them to a more youthful state. Numerous studies have shown that increasing NAD+ levels can increase energy and longevity.

Cognitive function

One of the most devastating consequences of aging is the decline in our cognitive function. However, the evidence shows that our lifestyle significantly impacts our probability of developing neurodegenerative conditions such as Alzheimer's. Optimizing your lifestyle and using proper supplementation can improve your chances of staying mentally fit well into old age.


Your genetics only account for about 25% of your longevity. The other 75% is determined by your lifestyle choices. Our longevity guide includes a comprehensive diet program that has been shown to increase lifespan by 10 years compared to the average American diet. And our supplement contains compounds such as Glucosamine and NMN, shown to increase lifespan in various model organisms and improve important health biomarkers in humans.

Visual signs of aging

As we age, the collagen levels in our skin naturally decline, causing wrinkles. Fighting skin aging with creams is not sufficient. We include compounds such as glucosamine and aAKG in our supplement to help you fight skin aging from the inside, restoring a more youthful and radiant appearance. These ingredients have been shown to improve skin elasticity and reduce the appearance of wrinkles in human clinical trials, as well as reverse hair graying in multiple animal studies


Aging negatively impacts our immune system, making it less effective in fighting off illness and infection. A diet rich in nutrients and a longevity-optimized lifestyle helps maintain and improve immune function. Our supplement contains compounds that support the immune system and reduce the risk of age-related immune decline.

Overall health

Our program will give you insights into how different lifestyle choices are associated with age-related diseases and other health issues. Understanding these connections enables you to make informed decisions regarding diet, physical activity, sleep, and healthy habits. And our team of experts will support you throughout your entire journey.

As Seen in

Targeting some of the hallmarks of aging can delay or prevent the development of many diseases
How to Age In Reverse: A wellness revolution!
Your Blueprint for Optimal Health, Longevity, and Peak Performance
Enabling a better understanding of aging pathways and how they can be controlled


Based on 112 reviews

Invest in yourself, invest in your health

With your personalized state-of-the-art longevity solution. Slow down aging and increase your longevity potential.

Swiss quality and innovation

Stringent lab standards in production

Highest purity of ingredients

Rigorous third-party testing

100% satisfaction and money-back guarantee

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Highest quality and safety guaranteed

Third-party lab tested

Highest quality certifications to ensure safety, purity, and effectiveness.


Solutions based on numerous peer-reviewed studies and the latest scientific findings.

Swiss quality

Developed in Switzerland, with strict quality standards in the health and wellness industry.

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Take our free Longevity Quiz

Discover how your current lifestyle is impacting your aging process. Start now and get personalized insights and recommendations for improving your health and longevity. Take control of your aging process now

Start for free
  • Results archive

    Access information about your tests at any time — use
    it for yourself or share with your healthcare provider

  • Health progress

    Track how your health metrics change using
    infographics and easy to understand charts

  • Relevant notifications

    Set formula-intake reminders and never forget when
    it’s time for your retest



How does the program work?

What are the benefits of the program?

How is your longevity guide personalized to me?

Can I access your longevity guide on multiple devices?

How much does your longevity guide cost?

Is there a money-back guarantee for your longevity guide?

Can I cancel my subscription to your longevity guide at any time?

How is your longevity guide different from other guides or programs on the market?

How long does it take to complete your longevity guide?

What if I have questions or need support during my program?

What is KEEY, and how does it work?

What are the benefits of taking KEEY?

Is KEEY backed by scientific research?

What is the recommended dosage of Extensia?

How is KEEY made, and is it safe?

Can I buy KEEY in stores?

What is the difference between Extensia: KEEY and Extensia: KEEY + PATH?

How much does KEEY cost?

What is Extensia?

Can lifestyle choices impact longevity?

What are the key factors that affect longevity?

What's the difference between lifespan and healthspan?

Who are the research partners for the program?

Can I cancel my subscription at any time?

How do I get started with the program?

Clinically proven

Our medical team has proven the positive effects of the system on metabolism through 24 clinical studies published in international journals


of customers have improved their microelement status based on our comprehensive studies

Learn how you can slow your aging process

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