Longevindex

Topic

Diagnostics & Testing

Blood panels, microbiome tests, genetic analysis, and at-home health diagnostics.

Guides

Continuous Glucose Monitoring: The Complete Guide
Diagnostics & Testing
12 min readDeep dive

Continuous Glucose Monitoring: The Complete Guide

A continuous glucose monitor (CGM) reveals how YOUR body responds to food in real-time, not population averages. Dave Asprey calls it the most impactful health tool he's used. This guide covers how CGMs work, what you'll learn, and how to use the data to optimize energy, weight, and long-term metabolic health.

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Gut Microbiome: The Complete Guide
Diagnostics & Testing
15 min readDeep dive

Gut Microbiome: The Complete Guide

Your gut microbiome, 100 trillion bacteria, influences immunity, mood, metabolism, and inflammation. Bryan Johnson tests his monthly. This guide covers microbiome testing, evidence-based interventions, and what actually moves the needle vs marketing.

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Blood Panel Testing: The Complete Guide
Diagnostics & Testing
14 min readDeep dive

Blood Panel Testing: The Complete Guide

Annual bloodwork is the foundation of data-driven biohacking. Peter Attia's framework prioritizes ApoB, insulin, HbA1c, and inflammatory markers over standard lipid panels. This guide covers what to test, how often, where to order, and how to interpret results.

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VO2 Max: The Complete Guide
Diagnostics & Testing
13 min readDeep dive

VO2 Max: The Complete Guide

VO₂ max — the maximum rate at which you can use oxygen — is one of the best-studied predictors of all-cause mortality. Peter Attia calls it a vital sign. This guide covers lab testing vs wearable estimates, what 'good' looks like by age, and a training mix of Zone 2 plus intervals.

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Oral Microbiome: The Complete Guide
Diagnostics & Testing
12 min readDeep dive

Oral Microbiome: The Complete Guide

The oral microbiome is a distinct ecosystem — not just a subset of gut health. Oral dysbiosis links to gum disease, cardiovascular inflammation, and possibly cognitive markers. Nasal breathing, hygiene, and targeted oral care are actionable biohacks. This guide connects mouth tape, dental basics, and what actually moves oral bacteria.

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Body Composition Tracking: The Complete Guide
Diagnostics & Testing
11 min readDeep dive

Body Composition Tracking: The Complete Guide

Weight alone misleads longevity-focused people — especially on GLP-1s, creatine, or a new lifting program. This guide compares DEXA, smart scales, and waist circumference, and how often to measure without obsession.

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ApoB & Lipids for Longevity: The Complete Guide
Diagnostics & Testing
12 min readDeep dive

ApoB & Lipids for Longevity: The Complete Guide

Cardiovascular disease remains a top killer; lipid panels are the cheapest longevity blood test most people skip interpreting correctly. This guide explains ApoB vs LDL-C, Lp(a), and lifestyle plus supplement levers — not statin prescribing.

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Bone Density for Longevity: The Complete Guide
Diagnostics & Testing
11 min readDeep dive

Bone Density for Longevity: The Complete Guide

Bone is living tissue that responds to load. Osteoporosis and sarcopenia together drive falls, fractures, and loss of independence — the outcome Peter Attia calls 'the marginal decade.' This guide covers DEXA interpretation, resistance training, calcium/vitamin D/K2, and who needs medical treatment beyond lifestyle.

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Gundry, Lectins & the Microbiome: The Complete Guide
Diagnostics & Testing
16 min readDeep dive

Gundry, Lectins & the Microbiome: The Complete Guide

Cardiac surgeon Steven Gundry built a massive following by linking lectins, leaky gut, and the microbiome to obesity and autoimmune disease. This guide explains his framework fairly, separates strong ideas from contested claims, includes practical recipes, and links his core books on Amazon.

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Referenced Equipment

Equipment from our guides, with specs and trusted purchase links.