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New review: What the largest sleep-and-longevity study yet actually found — and the three habits it points to.
Healthy Aging · The Big Read
The body metric most people over 40 are quietly getting wrong
It isn’t your weight, your BMI, or your step count. Researchers say the signal that best predicts how well you’ll age is one almost no one tracks.
By Hannah Coyle8 min readMedically reviewed
Nutrition
Protein after 40: how much you actually need, by the research
5 min
Movement
Grip strength is the cheapest longevity test you’re not doing
6 min
Longevity
The four-letter word that explains most « anti-aging » gains: rest
7 min
Latest in Health
View all →
Metabolism
Why your resting metabolic rate matters more than your calorie app
A look at what actually drives daily energy use — and how little of it you control by counting.
Dr. Elena Marsh4 min
Heart
Resting heart rate, decoded: what’s normal and what’s worth a check
The single number on your watch that’s genuinely worth paying attention to.
James Okafor5 min
Bloodwork
The five lab markers a longevity doctor checks first
Beyond cholesterol: the panel that tells a fuller story about how you’re aging.
Dr. Priya Shah6 min
Nutrition, in depth
All nutrition →
Field Guide
A no-nonsense guide to building a high-protein plate after 40
What a physiologist actually puts on the table — and the swaps that close most people’s protein gap without a shake.
Hannah Coyle9 min
Myth Check
Do you really need to eat every three hours? The evidence says no
We trace where the « stoke your metabolism » advice came from — and what the controlled trials found instead.
James Okafor7 min
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Magnesium for sleep: what’s hype and what holds up
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VO₂ max explained without the jargon
Longevity · 6 min
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Why women’s strength needs change at menopause
Health · 7 min
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The cold-plunge research, calmly summarized
Recovery · 5 min
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Creatine isn’t just for lifters anymore
Nutrition · 4 min
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How to read a supplement label like a scientist
Reviews · 6 min
8
Walking after meals: small habit, real numbers
Movement · 3 min
9
The longevity diet, minus the marketing
Longevity · 8 min
Paid Partnership
Start tracking the metric that matters — not the scale
Inside our sponsored deep-dive: why lean muscle is the signal to watch after 40, and the protein approach physiologists recommend.
Read the feature →
Our experts
Meet the team →
Dr. Elena Marsh
Nutritional Physiology
Translating muscle and metabolism research into plain language.
Dr. Priya Shah
Longevity Medicine
On biomarkers, screening, and aging well on the evidence.
James Okafor
Exercise Science
Strength, cardio, and recovery — sorted from the noise.
Hannah Coyle
Senior Health Writer
Big-read reporting on how we actually stay healthy.
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