- Biomarkers
What your ferritin number really tells you about energy
Low iron stores are among the most common reasons people feel worn out. Here’s what the number means, and when to act on it.
Dr. Ines Carvalho
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6 min read
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A plain-English guide to cortisol, thyroid, insulin, estrogen and testosterone, and how they affect each other.
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ApoB vs. LDL: the heart marker a physical can miss
Why more cardiologists now look past basic cholesterol totals and count the particles that really matter.
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What to eat (and avoid) before a blood test
Fasting, coffee, supplements and exercise: a short checklist so your results reflect the everyday you.
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- Biomarkers
Vitamin D: how much is enough in a Boston winter?
Taking vitamin D blind is common and mostly harmless, but testing first tells you the right dose, and whether you need one.
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- Perspective
Why we test before symptoms appear
Most chronic conditions show up in your bloodwork years before they ever show up in how you feel day to day.
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- Sleep
How a good night’s sleep shows up in your bloodwork
Just two weeks of short nights can push glucose, cortisol and testosterone far enough to change a panel.
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- Hormones
How to read a thyroid panel without panicking
A TSH just outside the range is common, often temporary and seldom a reason to start medication that week.
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- Nutrition
Optimizing protein, muscle and aging well, naturally
Muscle is the organ most of us forget to protect, and the one that best predicts how the next thirty years go.
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- Guides
How often should you really retest?
A simple rhythm: once a year when things are steady, and twelve weeks after any change worth measuring.
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