Learn how to read your own biology
Practical, science-grounded guides on blood testing, biomarkers, and how to actually use your results.
Inside the Cascade Model: How Zaro's Three-Tier Testing Actually Works
Surface, Signal, and Source aren't just price tiers. Each one answers a fundamentally different question about your health. Here's how the cascade model works and why it matters.
How Often Should You Actually Get Blood Work Done?
Annual physicals check a box, but they're not built to catch change. Here's how often to test, and why your Zaro Score adapts as you add more data.
What Is Lp(a)? The Genetic Cholesterol Risk Most Blood Tests Miss
One in five people carry a genetic cardiovascular risk factor that a standard lipid panel will never show them. Here's what Lp(a) is and why it's only tested once.
Is At-Home Blood Testing FSA/HSA Eligible?
Yes — here's exactly how to use your FSA or HSA card to pay for a Zaro panel, and why testing like this qualifies as an eligible medical expense.
Why Regular Blood Testing Matters More Than Your Annual Physical
A once-a-year snapshot misses the trend. Here's why quarterly testing catches problems while they're still reversible, not after they become diagnoses.