- Biomarkers
What your ferritin level really says about your energy
Low iron stores are one of the most common reasons people feel drained. Here’s what the number means — and when to act on it.
Dr. Camila Reyes
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6 min read
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Written and reviewed by our physicians.
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- Hormones
The five hormones that shape your mood, sleep
A plain-English tour of cortisol, thyroid, insulin, estrogen and testosterone — and how they talk to each other.
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- Heart health
ApoB vs. LDL: the heart marker your checkup might miss
Why do more cardiologists look past basic cholesterol totals to count the specific particles that actually matter.
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5 min read
- Guides
What to eat (and skip) before your blood test
Fasting, coffee, supplements and workouts — a simple checklist so your results reflect the real you.
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4 min read
- Biomarkers
Vitamin D: how much is actually enough in winter?
Supplementing blind is common and mostly harmless — but testing first tells you the dose, and whether you need one at all.
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5 min read
- Perspective
Why we test before symptoms ever show up
Most chronic conditions announce themselves in bloodwork years before they announce themselves in how you feel.
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6 min read
- Sleep
What a good night’s sleep does to your bloodwork
Two weeks of short nights move glucose, cortisol and testosterone enough to change how a panel reads.
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7 min read
- Hormones
Reading a thyroid panel without panicking
TSH slightly out of range is common, frequently temporary, and rarely a reason to start medication that week.
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6 min read
- Nutrition
Optimizing protein, muscle, and ageing well naturally
Muscle is the organ most people forget to protect — and the one that predicts how the next thirty years go.
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5 min read
- Guides
How often should you actually retest?
A simple schedule: annually if things are steady, twelve weeks after any change worth measuring.
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4 min read
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No newsletter theatre — just the piece we think is worth your time, written by the doctor who ran the numbers.