Longevity

Longevity & Aging Well

The science of living longer and healthier — biomarkers, preventive care, and anti-aging research.

Man in his late 40s running on a track at dusk, face showing hard effort, documentary black-and-white photography

longevityJun 8, 202615 min

VO2 Max Mortality Calculator: How Fit Are You, Really?

Calculate your VO2 max fitness zone and mortality risk based on JACC 2022 data from 750,000+ men. Each 1-MET gain cuts all-cause mortality risk by 13%.

Middle-aged man measuring his waist with a tape measure, black and white documentary photography

longevityJun 7, 202618 min

Waist-to-Height Ratio Calculator: Your Cardiovascular Risk in 30 Seconds

Find your CVD risk zone using waist-to-height ratio and 2025 Lancet data. Above WHtR 0.50 CVD risk rises; above 0.58, mortality risk is 35.5% higher.

Middle-aged man walking purposefully on an urban sidewalk, captured in documentary black-and-white photography

longevityJun 3, 202618 min

Daily Steps Mortality Calculator: How Much Does Your Step Count Matter?

Find your mortality risk zone based on your daily step count. Uses 2023 JACC meta-analysis data showing 50-70% lower all-cause mortality above 7,000 steps per day.

Man in his 50s reading supplement labels at a pharmacy counter in morning light, documentary black and white photography

longevityMay 15, 202616 min

NMN and NAD+ Supplements for Men: Do They Work? A Review

Human trials confirm NMN and NR raise NAD+ levels in blood. Here is what the clinical evidence actually shows—and does not show—for men over 40.

Middle-aged man reviewing blood test results with his doctor during an annual physical examination, black and white documentary photograph

longevityMay 8, 202614 min

Preventive Health Care Checklist for Men Over 40

A preventive health care checklist for men over 40: 15 evidence-based screenings and tests backed by USPSTF guidelines and peer-reviewed research.

Man in his early 50s examining supplement bottles on a wooden table in morning light, documentary black and white photograph

longevityMay 2, 202614 min

Anti-Aging Supplements That Actually Work for Men (Evidence-Based)

Most anti-aging supplements are marketing. These 7 have human trial data—here are the evidence summaries and dosing protocols for men over 40.

Man in his late 40s checking a wrist wearable in early morning light, unretouched black and white documentary photograph

longevityApr 26, 202614 min

How to Improve Heart Rate Variability (HRV) for Men Over 40

SDNN below 70ms means 73% higher cardiac risk per Frontiers 2025 data. Learn what your HRV score means and 8 evidence-based ways to improve it in 8 weeks.

Man in his late 40s studying blood test lab results at a desk, black and white documentary photograph

longevityApr 19, 202613 min

Biological Age Tests for Men: How to Check and Improve Your Score

Find out how to check your biological age as a man over 40. Compare blood biomarker tests vs. epigenetic clocks, understand what the results mean, and get evidence-backed ways to lower your score.

Man in his late 40s reviewing blood test results at a doctor's desk, black and white documentary photograph

longevityApr 13, 20269 min

Biological Age Calculator: What Your Blood Work Actually Reveals

Calculate your biological age from 9 routine blood test values using the clinically validated PhenoAge formula. See how your body's aging compares to your chronological age.

Middle-aged man seated in a dim wooden Finnish sauna, sweating, leaning forward, documentary B&W photography

longevityApr 11, 202614 min

Sauna Benefits for Longevity: What the Research Says for Men

Finnish men who sauna 4-7x/week cut cardiovascular death risk by 50%. Here's the full science on sauna benefits for longevity, brain health, and recovery.

Middle-aged man running hard uphill on a forest trail, intense effort visible, documentary B&W photography

longevityApr 2, 202614 min

VO2 Max Training for Men Over 40: How to Improve Your Score

VO2 max predicts lifespan better than cholesterol or blood pressure. Here's how men over 40 can raise their score with science-backed training protocols.

Black and white documentary photograph of a fit middle-aged man stretching outdoors in morning light, photojournalistic style

longevityMar 25, 202618 min

15 Longevity Habits Every Man Over 40 Should Adopt

Discover 15 evidence-based longevity habits for men over 40 that reduce mortality risk and extend healthspan. Actionable steps backed by peer-reviewed research.

Black and white documentary photograph of a man jogging on an empty road at sunrise, photojournalistic style

longevityMar 22, 202616 min

Zone 2 Cardio for Longevity: Why Every Man Over 40 Should Do It

Discover why zone 2 cardio is the most important exercise for longevity after 40. Includes heart rate targets, weekly plans, and the science behind it.