YEARS Journal

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Insights, guidance, and editorial content on prevention and longevity.

nad+-supplement

NAD+ Supplement: Evidence, Effects & What to Measure | YEARS

NAD+ is ubiquitous. In longevity forums, the daily routines of tech CEOs, and the aisles of supplement providers, the molecule is touted as a key to cellular energy, repair, and a healthier life…

Niko Hems, M.Sc.·19 June 2026
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Person running outside

Longevity Biomarkers for Performance & Recovery

You train regularly, watch your diet, and prioritize sleep. You feel good. But do you really know how capable your body is? How well it recovers? And what foundation you are laying today for a long…

Niko Hems, M.Sc.·19 June 2026
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YEARS Laboratory, someone holding blood

NAD+ Supplements: Evidence, NMN vs NR & What to Measure

NAD+ is everywhere. From longevity forums and tech CEO endorsements to supplement aisles, it is touted as a key molecule for energy, cellular repair, and a longer, healthier life. The promises are…

Niko Hems, M.Sc.·15 June 2026
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YEARS Clinic in Berlin

What Does a Longevity Check-Up Actually Measure?

You feel healthy. Your last doctor's visit was a year or two ago, and everything was normal. You are in your mid-40s, professionally engaged, and occasionally find time for sports. So why consider a…

Niko Hems, M.Sc.·14 June 2026
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YEARS Clinic: Patient undergoing blood draw

Essential Blood Tests in Your 30s: A Comprehensive Guide | YEARS

You are in your early 30s. The rent or mortgage is paid, and your career is on track. You feel healthy, fit, and perhaps only occasionally a bit tired. A comprehensive health screening isn't exactly…

Niko Hems, M.Sc.·08 June 2026
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Ozempic pen

GLP-1, Ozempic & Longevity: Evidence, Risks & Biological Age

Ozempic, Wegovy, Semaglutide. These names dominate headlines, social media feeds, and conversations in medical practices worldwide. What began as a medication for type 2 diabetes has become the…

Niko Hems, M.Sc.·02 June 2026
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TRT Therapy in a clinical setting

Testosterone Levels in Men: Normal Ranges, Symptoms & TRT

Testosterone is more than just a hormone. In the public eye, it represents masculinity, strength, and vitality—yet it is simultaneously the subject of myths, marketing promises, and medical…

Niko Hems, M.Sc.·02 June 2026
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Person outside walking - behind him sunlight

UVA Skin Aging: Causes, Prevention & Diagnostics | YEARS

Most people associate skin aging with the passage of time. With every birthday, a new line appears on the face. Yet, the process is far more complex. A significant portion of what we perceive as…

Niko Hems, M.Sc.·01 June 2026
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YEARS Laboratory

Lp(a) Lipoprotein(a): The Genetic Heart Risk Factor Nobody Tests For

Imagine a risk factor for heart attacks and strokes that is more potent than high cholesterol. It is elevated in one out of every four Europeans. It is almost entirely determined by your genes, and…

Niko Hems, M.Sc.·29 April 2026
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Ergospirometry in the years clinic

Garmin VO2max Accuracy: Smartwatch Estimate vs. Lab Test | YEARS

Your Garmin watch shows you a VO2max score after every run. A score of 45. Yesterday it was 44. A week ago, 46. You track this trend, celebrating the increases and feeling frustrated by the dips…

Niko Hems, M.Sc.·21 April 2026
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Picture of mountain

Clinique La Prairie vs. YEARS: An Honest Longevity Clinic Comparison

For many, the search for the right longevity clinic ends in one of two places: the legendary Clinique La Prairie on Lake Geneva or a modern, outpatient clinic like YEARS in Berlin. Both promise to…

Niko Hems, M.Sc.·21 April 2026
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YEARS Full Body MRI

Ezra vs. Prenuvo vs. YEARS: A Full-Body Scan Comparison

The market for preventive full-body screenings is expanding rapidly. Driven by a new wave of health consciousness and the desire to proactively address disease, more people are seeking comprehensive…

Niko Hems, M.Sc.·21 April 2026
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YEARS Laboratory doing liquid biopsy analysis

Galleri Test Alternatives: A Guide to Cancer Blood Tests

A single blood test to detect over 50 types of cancer, years before symptoms appear. This is the promise of the Galleri test. While the name appears regularly in the media, the test is scarcely…

Niko Hems, M.Sc.·21 April 2026
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Old woman doing sports happily

Medicine 3.0: A Guide to Peter Attia's Longevity Framework

In Germany alone, over 340,000 people die each year from cardiovascular disease and over 230,000 from cancer. Many of these deaths are considered premature and potentially avoidable. Our current…

Niko Hems, M.Sc.·21 April 2026
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Woman looking on smartwatch while running

Oura Ring vs. Health Check: A Medical Comparison for 2026 | YEARS

You wear an Oura Ring, Apple Watch, or another wearable. You track your sleep, heart rate variability (HRV), and activity levels. The data gives you a sense of control. But eventually, the question…

Niko Hems, M.Sc.·21 April 2026
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YEARS Liquid Biopsy Assessment

Liquid Biopsy: A Comprehensive Guide to Early Cancer Detection

Cancer is most often diagnosed when symptoms appear, a point at which the disease is frequently advanced. Detecting tumors long before they become palpable—finding direct evidence of cancer in the…

Dr. med. Jan K. Hennigs·20 April 2026
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YEARS Doctor explaining results to patient

Longevity Diagnostics: A Guide to Measuring Your Biological Age

The term "longevity" is everywhere. Tech billionaire Bryan Johnson reportedly spends over two million dollars a year to measure and optimize his body. The underlying idea is not new: the goal is to…

Niko Hems, M.Sc.·20 April 2026
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YEARS DNA Graphic

YEARS vs. Superpower: A Comparison of Longevity Diagnostics

The market for longevity medicine is growing rapidly, and with it, the confusion. On one side are digital platforms like Superpower, advertising with slogans like "100+ biomarkers for $199 per…

Niko Hems, M.Sc.·20 April 2026
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YEARS doctor preparing ultrasound analysis

YEARS vs. Neko Health: A Longevity Clinic Comparison

A comprehensive health check-up is expensive, time-consuming, and the differences between providers are greater than their glossy brochures suggest. In Berlin, a market for longevity and preventive…

Niko Hems, M.Sc.·20 April 2026
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YEARS Laboratory assessment

YEARS vs. Function Health: A Longevity Diagnostics Comparison

Longevity medicine is evolving rapidly. Providers like the US-based Function Health and the Berlin clinic YEARS promise deeper insights into your health than a traditional doctor's visit can…

Niko Hems, M.Sc.·20 April 2026
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YEARS Red Cloud Image

YEARS vs. Biograph: A Longevity Clinic Comparison (2026)

Anyone investing in comprehensive longevity diagnostics will quickly encounter two names: YEARS in Berlin and Biograph in the US. Both clinics assess health on a level far beyond standard check-ups…

Niko Hems, M.Sc.·20 April 2026
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YEARS Performance Battery Assessment

What Is Longevity? A Medical and Scientific Definition

The term "longevity" is everywhere. It promises a longer, healthier life and is often associated with expensive supplements, lifestyle gurus, and futuristic technologies. But behind the marketing…

Niko Hems, M.Sc.·20 April 2026
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YEARS Biological Clock and Speed of Aging Graphic

Bryan Johnson's Biomarkers: The Science and Limits of Biological Age

Tech entrepreneur Bryan Johnson spends two million dollars annually on his "Project Blueprint." The goal: to reduce his biological age and slow the aging process. His protocol involves hundreds of…

Niko Hems, M.Sc.·20 April 2026
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YEARS Laboratory inside the Clinic

Longevity Clinics: Programs, Costs & Evidence in 2026

The market for preventive health checkups is growing, with a projected annual growth rate of 8.4% through 2030 (Research and Markets, 2024). Within this trend, longevity clinics are gaining…

Niko Hems, M.Sc.·20 April 2026
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YEARS Laboratory doing some blood analysis

Silent Diseases: 5 Conditions With No Symptoms & How to Find Them

The greatest risk to your health is the feeling of being completely healthy. While you manage your daily life, lead projects, and make plans for the future, processes can unfold within your body…

Niko Hems, M.Sc.·20 April 2026
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YEARS Laboratory doing some blood analysis

What Blood Tests Should You Get? A Science-Based Guide | YEARS

The last lab report from your doctor likely included your cholesterol and blood sugar levels. A solid baseline. But these values only cover a small fraction of what your blood can reveal about your…

Niko Hems, M.Sc.·20 April 2026
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Fit Person running

VO2 Max Charts by Age and Sex: What's a Good Value?

Your smartwatch gives you a score for your "cardiovascular fitness." Maybe you've improved it, or perhaps it's been stuck at the same level for weeks. While these estimates can be a useful guide…

Niko Hems, M.Sc.·20 April 2026
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Fit Person stretching his legs

Constant Fatigue: 10 Lab Tests to Uncover the Potential Causes

You sleep for seven hours but wake up feeling exhausted. That second coffee at 11 AM is no longer an option—it's a necessity. By afternoon, your concentration is gone. According to an analysis by…

Niko Hems, M.Sc.·20 April 2026
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Image of a Stone near a river - looks calming

Executive Health Check-up 2026: What's Covered & What's Not

As someone with private health insurance, you likely have access to first-class medical care. But when it comes to preventive health check-ups, there's often uncertainty: What exactly does your…

Niko Hems, M.Sc.·20 April 2026
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2 people running outside in nature

OGTT & Insulin Resistance: Detect It Years Before Diabetes

Your last health check-up likely included a fasting blood glucose value and perhaps an HbA1c. Both were probably in the normal range. While reassuring, this is not definitive proof of metabolic…

Niko Hems, M.Sc.·20 April 2026
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Doctor padding the back of a patient

Longevity vs. Biohacking: What Really Extends Healthspan

The longevity industry is a €50 billion sector driven by a captivatingly simple idea: slowing down aging. Yet the term itself has become so overloaded it means almost nothing. It's used to describe…

Niko Hems, M.Sc.·20 April 2026
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YEARS Fundoscopy Eye Assessment

What Is a Longevity Check-Up? Tests, Biomarkers & Costs

You feel healthy. Your last visit to the doctor was two years ago, and everything was fine. You're 48, busy with your career, and you go for a run sometimes. So why should you consider a longevity…

Niko Hems, M.Sc.·20 April 2026
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2 Older people hugging and laughing

Is a Health Check-Up Worth It? Benefits & Limits

A preventive health screening: for some, it's an annual ritual of self-optimization; for others, a questionable investment with an unclear return. The confusion is understandable. Public health…

Niko Hems, M.Sc.·20 April 2026
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YEARS Laboratory doing analysis of human cells

What Are the 5 Levels of Prevention? A Complete Guide

A heart attack at 50 is often the result of risks that began to build at 35. Many serious diseases don't announce themselves with sudden symptoms. They develop silently, over decades...

Niko Hems, M.Sc.·20 April 2026
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YEARS Brain Image

P-tau217: The Breakthrough Alzheimer's Blood Test

The prospect of cognitive decline in later life is a significant concern for many, especially those whose careers depend on peak mental performance. For decades, diagnosing Alzheimer's disease was a…

Dr. med. Jan K. Hennigs·20 April 2026
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Fit Person stretching his legs before a run

Muscle Mass and Longevity: The Scientific Guide to Aging Stronger

Most people track their weight. But the number on the scale is one of the least accurate metrics for health and longevity. An 85-kilogram man with 15% body fat has a completely different health…

Niko Hems, M.Sc.·20 April 2026
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