Everyone talks about cortisol. Only a few understand how to measure it properly. A single morning blood draw has notoriously poor reliability. "Adrenal fatigue" doesn't exist as a medical diagnosis. But HPA axis dysregulation, the science behind chronic stress, predicts cardiovascular death, diabetes, and accelerated aging. Here's what actually matters according to the latest research.

Standard glucose screening is designed to catch diabetes. Not prevent it. By the time fasting glucose or HbA1c crosses the diagnostic threshold, insulin resistance has typically been progressing for a decade or more. Here's what your test results aren't telling you, and why measuring insulin changes everything.

Activated charcoal is a WHO-listed essential medicine for acute poisoning. It's also the star ingredient in $12 black lemonades, charcoal toothpaste, and "detox" capsules sold at every health store in Europe. The gap between those two realities tells you everything about where the science ends and the marketing begins.

Standard thyroid screening tests TSH alone. But TSH can look perfectly normal while active thyroid hormone runs low, conversion fails, and autoimmune antibodies quietly destroy the gland. A 134,346-person meta-analysis just redefined what "optimal" thyroid function actually means, and it's not what the lab reference range says.

Biological age is the longevity metric you will see everywhere. But the gap between what these tests actually measure and what people think they measure has never been wider. Here's the evidence-based guide to what's real, what's noise, and what you can actually do about it.

Nearly everyone in the biohacking community supplements or has supplemented vitamin D. Almost nobody tests before and after. That means millions of people are dosing blind. Most of us are busy underdosing, overdosing, or supplementing a nutrient our bodies can't even activate without the right cofactors.

Standard cholesterol panels measure the mass of cholesterol inside your lipoproteins. But it's the number of particles carrying that cholesterol that actually drives plaque buildup. Often blood tests never make that distinction.

Most blood tests measure what's floating in your serum. But serum is simply a short-term snapshot that can look perfectly normal even when your cells are running on empty. The real story lives inside your red blood cells, and some labs inadvertently blur the line between the two.

A major study says 38% of cancers are preventable. But it left out newer risks like processed food, forever chemicals, and microplastics. When you factor those in, the real number is likely much higher. Millions more lives could be saved. Sounds remarkable? Read on.

Women's periods synced with the moon for centuries, until LEDs and smartphones took over after 2010. Studies show artificial blue light disrupts the hormones that regulate cycles, and the effects don't bounce back easily.

Seaweed's health benefits aren't direct, they work through your gut. Special fibers feed good bacteria that lower blood pressure, blood sugar, and protect against antibiotics. But the type, prep method, and sourcing matter more than most experts realize.

Aniva Health and Sunday Natural are partnering to integrate personalized supplement recommendations directly into Aniva’s data-driven health platform.

Trust is the single biggest variable in preventive health. Aniva Health was built on the premise that a start-up must out-perform incumbents on transparency, rigour and user respect before it deserves a licence to operate.

Discover how your iron levels could be secretly sabotaging your health - or holding the key to boundless energy. Find out where you stand in just 5 minutes with Aniva Health's comprehensive biomarker panel.