Biomarker deep-dives, longevity science, and the research behind your Merios health score.
How much muscle you really lose on Ozempic or Zepbound, what happens when you stop, which peptides have evidence, and the blood tests worth tracking.
106 articles
Can you drink coffee before a blood test? Black coffee can skew fasting glucose, lipid, cortisol and testosterone results. What to avoid, and why.
Ferritin vs iron saturation: one measures stored iron, the other iron in transit. Learn what each means, their normal ranges, and why they can disagree.
MCV and MCH on a blood test measure the size and hemoglobin content of your red blood cells. Learn the normal ranges and what high or low values suggest.
The blood tests that actually predict how you age — ApoB, Lp(a), fasting insulin, hs-CRP, omega-3 index and more. What to order, the cost, how often to test.
The foods most linked to a longer life — legumes, whole grains, nuts, olive oil, fish — how much to eat, and the blood markers that show it's working.
VO2 max may be the best fitness predictor of lifespan. How to raise it — zone 2, intervals, the Norwegian 4x4 — and how to track your progress.
Biological age can run faster or slower than your birthdays. The evidence-based levers that lower it, and the markers and clocks that track it.
Muscle mass and strength are among the best predictors of lifespan. Why muscle protects you as you age, how to build and keep it, and the markers that track it.
Learn how to prepare for a blood test: fasting, water, coffee, alcohol, medications, exercise, and timing — plus the exact markers each factor changes.
Blood biomarkers explained marker by marker: what each of the 20 most important ones measures, its optimal range (not just normal), and why it matters.
Inflammation markers like hs-CRP, homocysteine, and ferritin reveal hidden low-grade inflammation. What an inflammation markers blood test really shows.
Is my blood test bad? A calm framework to tell urgent from harmless: why one out-of-range value rarely means trouble, and which results labs flag right now.
Your lab's 'normal' range flags disease, not health. Learn how optimal blood test ranges differ, where the gap is widest, and how to read your own results.
Continuous glucose monitors are booming among healthy people. Here's what a CGM actually shows if you're not diabetic — and when it's worth it.
Your labs say 'normal' but you feel terrible? Why standard ranges miss so much, which markers to look at, and how to find the gap between normal and optimal.
Convert any HbA1c to your estimated average glucose (eAG) in mg/dL and mmol/L. Full A1c-to-blood-sugar chart from 4.0 to 14.0%, plus the formula.
A fasting glucose of 110 mg/dL falls in the prediabetes range. What 110 means, why it matters, and how to get your fasting blood sugar back under 100.
HbA1c 5.6% is normal, but one step from prediabetes. What 5.6% means, your estimated average glucose, and how to keep it from climbing.