Longevity
Biomarkers, healthy aging, preventative health, and lifespan research.
88 articles in Longevity · page 1 of 8
What's a Good VO2 Max? Norms by Age and Sex
What counts as a good VO2 max by age and sex? See normative ranges from Cooper Institute, ACSM, and FRIEND data, and where your own number lands.
Read →Blood PhenoAge vs Epigenetic Clock Tests
Blood PhenoAge and epigenetic clocks both estimate biological age. Here's how the two test types differ on cost, evidence, and what each actually measures.
Read →Low Albumin and Longevity: What It Signals
Low albumin is tied to higher mortality in older adults. What albumin signals about inflammation and aging, and why it's a biological age marker.
Read →RDW Blood Test: What a High RDW Means
RDW measures how much your red blood cells vary in size. What a high result means, RDW-CV versus RDW-SD, and why it predicts mortality even without anemia.
Read →How to Lower Your Biological Age: What Works
How to lower your biological age, according to the trials: what caloric restriction, exercise, and diet moved on aging clocks, and what didn't.
Read →The 9 Blood Markers Behind Your Biological Age
The nine PhenoAge blood markers behind your biological age, what each one signals, typical ranges, and why albumin and lymphocytes push the score down.
Read →What Your PhenoAge Score Actually Means
Your PhenoAge score turns nine blood markers into a phenotypic age. What the number means, how age acceleration works, and what it can't tell you.
Read →High Alkaline Phosphatase: What ALP Elevation Points To
ALP comes from bone and liver in roughly equal share. One extra test tells you which — and the mortality data starts inside the normal range.
Read →ALT on a Blood Test: What the Number Actually Means
Your lab's normal range for ALT is probably too high, and a low result is not automatically good news. What the liver enzyme tracks, and what it doesn't.
Read →AST on a Blood Test: What It Adds Beyond ALT
AST is not a liver-specific enzyme, which is why it is read next to ALT rather than alone. What the ratio between them does and does not predict.
Read →Hematocrit on a Blood Test: What the Percentage Means
Hematocrit is the share of blood volume made of red cells. What counts as high, and why one long cohort's cardiovascular signal vanished under adjustment.
Read →MCH and MCHC on a Blood Test, Explained
MCH is hemoglobin per red cell; MCHC is hemoglobin concentration within it. One is mostly redundant, the other is the index most likely to be an artefact.
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