Hey Reader, Dr Karl here. It shows up in the data, and it's the opposite of what most people track. When I plot my clients by age, something shows up that I didn't go looking for. The older people in my data — the ones still healthy, still going — have a much lower fasting insulin. Not lower cholesterol. Not ...
Hey Reader, Dr Karl here. It predicts dementia and heart disease. Almost nobody orders it. And he got Fired from his lab at Harvard when no one would support his research. In the late 1990s a researcher named Kilmer McCully was working at Harvard on a marker called homocysteine. He thought it explained a great deal ...
Hey Reader, Dr Karl here. Six labs. Most doctors won't order half of them. Over the last two weeks I've shown you my own numbers at 70 — the pairings, the surprise, and why "in range" told me almost nothing. So here's the practical end of it. If you want to know where you actually stand, this is the short ...
Hey Reader, Dr Karl here. Two of my numbers moved the wrong way this year. IGF-1 dropped 30 points — from 142 to 115. Fasting insulin rose from 3.6 to 4.5. Neither is alarming on its own. Together, moving in opposite directions in the same year, they're a question. So I went looking for what changed. About a ...
Hey Reader, Dr Karl here. My fasting glucose came back 102. The lab flags that high — technically pre-diabetic. ...
