The best longevity supplements ever developed.

Made in Germany with German raw materials. Third-party tested in Switzerland.

Rated 4.9 from 1,000+ reviews. 1.37M+ servings.

An open MASI Premium NMN jar beside a blue ocean wave. Shop now

99.7% pure.

5 Anti-Aging Supplements
Targeting 5 Key Reasons of Aging

Pharmaceutical-grade. 99.7% pure. Manufactured in Germany.

NMN - the king of longevity

Restores vitality in every cell.

Shop now

RESVERATROL

Reactivates the youth gene SIRT1.

Shop now

SPERMIDINE

Activates weight loss mechanism to slow aging.

Shop now

FISETIN

Eliminates senescent cells to renew the body.

Shop now

Premium Hair Complex

The most powerful hair supplement ever.

Shop now

Your next chapter

Consider anti-aging supplements if you…

  • Are over 40

    Want to feel youthful and energetic.

  • Want lasting energy

    Feel strong through the day and into the evening.

  • Prefer natural weight support

    Make healthy weight control part of your routine.

  • Think long term

    Want to stay healthy and active as you age.

  • Value cell renewal

    Care about healthy cells and a revitalized appearance.

  • Want more vitality

    Make everyday strength and a healthy libido a priority.

Explore supplements

Why choose MASI?

Longevity starts with science.

Formulas informed by longevity research.

Made in Germany.

Manufactured to strict quality standards.

See how it is made

Tested in Switzerland.

Independent checks. Results you can see.

See how it is tested
NMN analysis report
Made in Germany

At MASI, we pride ourselves on offering the purest and highest quality products to support your health and longevity journey. Our supplements are manufactured to a standard not yet seen in the industry, setting a new benchmark for product quality. The MASI benchmark.

Ordering supplements online can be a daunting task. The longevity market is flooded with untraceable products produced from unknown laboratories in Asia with subpar regulatory and quality standards. When it comes to your health and longevity, we believe quality comes first.

MASI supplements are produced in a leading manufacturing facility in Germany to the strictest German standards. Equally important is that all the products are made from the top quality raw material sourced only from certified and prominent raw material providers in Germany and also France, Italy and Netherlands. Vegan suitability varies by product. Premium Hair Complex contains marine collagen and is not suitable for vegans. Check each product page for ingredient and allergen information.

Tested in Switzerland

Following production at our state-of-the-art German facility, MASI supplements are independently tested at a leading laboratory in Switzerland for an unbiased evaluation of the product quality.

Each batch of production is tested for purity (temporarily not Fisetin), microbiology, and heavy metals, with the independent test results accessible to all customers through a QR code provided with the product and on our website.

We take quality control seriously as we want you to be sure of what exactly you swallow when taking MASI products.

See the independent lab reports

The people behind MASI

Meet the MASI medical board.

Expertise in longevity, medicine and nutrition.

Nathan K. LeBrasseur

Nathan K. LeBrasseur

PT, PhD

Mayo Clinic

Read profile
  • Professor, Mayo Clinic, Department of Physical Medicine & Rehabilitation
  • Director, Robert & Arlene Kogod Center on Aging
  • Co-Director, Paul F. Glenn Center for Biology of Aging Research
  • Scientific Director, Office of Translation to Practice
  • Mayo Clinic
Stefanos N. Kales

Stefanos N. Kales

MD, MPH, FACP, FACOEM

Harvard Medical School

Read profile
  • Professor of Medicine, Harvard Medical School
  • Professor & Director, Occupational Medicine Residency,
  • Harvard TH Chan School of Public Health
  • Division Chief, OEM, Cambridge Health Alliance
Wolfgang Bucke

Wolfgang Bucke

PhD, Pharmacist

Nutrition & phytotherapy

Read profile
  • Proven Expert on nutritional supplements and anti-aging medicine
  • Scientific work on liposomes
  • Key-note speaker on modern Phytotherapy

SCIENTIFICALLY BACKED FORMULAS

INSPIRED BY LEADING EXPERTS AND CLINICS

MASI follows the guidance of leading longevity experts worldwide, including Harvard Medical School and Mayo Clinic professors, to craft premium longevity supplements from German materials, rigorously tested in Switzerland:

  • Tokyo Institute of Technology, Nobel Laureate in Physiology or Medicine 2016 

    Professor Yoshinori Ohsumi

  • Harvard University, Nobel Laureate in Chemistry 2013 

    Professor Martin Karplus

  • New England Biolabs, Nobel Laureate in Physiology or Medicine 1993 

    Dr. Sir Richard Roberts

  • Stanford University, Nobel Laureate in Physiology or Medicine 2013 

    Professor Thomas Südhof

  • University of Chicago, Nobel Laureate in Physiology or Medicine 2009 

    Professor Jack Szostak

  • Einstein College of Medicine 

    Professor Ana Maria Cuervo

  • Mayo Clinic 

    Dr. Jim Kirkland

  • Harvard T.H. Chan School of Public Health 

    Professor Meir Stampfer

  • Specialist in Prevention / Diagnostics 

    Prof. Dr. Christoph M. Bamberger

  • University Hospital Jena, Clinic of Anaesthesiology and Intensive Care Medicine 

    Prof. Dr. Michael Bauer

  • University of Pennsylvania School of Medicine 

    Professor Joe Baur

Effective dosage

At MASI, we believe the optimal dose is critical for maximising your wellbeing.

NMN: lab-verified 99.7% purity

NMN

1000mg
per serving

Resveratrol

500mg
per serving

Spermidine

3mg
per serving

Fisetin

500mg
per serving

Hair Complex

2bottles
Two-part formula

Daily capsule guidance

For NMN, Resveratrol, Spermidine and Fisetin.

Follow the directions on each product label.

40–50 years
1 capsule per day
50 years and over
2 capsules per day
Why dosage and absorption matter

This is why we provide potent yet secure dosages of the finest quality ingredients, maximizing the benefits you receive from each NMN, Resveratrol, Fisetin and Spermidine supplements daily.

A common issue with most anti-aging supplements is their poor absorption and bioavailability, which means that low oral doses might be ineffective.

MASI longevity supplements leverages cutting-edge scientific insights to inform the dosage guidelines of our products, ensuring they are both safe and potent enough to exceed the necessary absorption and bioavailability rates for tangible health benefits.

Unlike many vitality supplement competitors who offer lower-priced products with doses much smaller than those found in MASI products, our approach prevents the risk of suboptimal intracellular concentrations that offer no real advantage. Our goal stands with lifespan extension. Why compromise on your health?

Here to help

A few things worth knowing.

Have another question? Contact the MASI team.

support@masi.eu
Which supplement is right for me?

Start with your goal. Each product page shows its benefits, ingredients, daily serving, and supporting studies.

Explore all supplements
Are all products vegan?

Ingredients and dietary suitability vary by product. Hair Complex contains marine collagen and is not vegan. Read each product page for ingredients and allergens.

How do subscriptions and cancellation work?

The 30-day supply is billed every 28 days (4 weeks). A one-time purchase is also available.

Cancel anytime by emailing support@masi.eu.

If you cancel before your second successful charge, an Early Cancellation Amount applies. It covers subscription discounts, welcome gifts, and other checkout discounts on your initial subscription order only.

After your second successful charge, cancellation is free.

How can I get help with my order?

Include your order number so the team can help with delivery or subscription changes.

support@masi.eu