Evidence-Based Supplement & Herb Guides

Bone Density for Longevity: DEXA Scans Explained

Learn how DEXA scans measure bone density, what T-scores and Z-scores mean, who should get tested, and how to use results to protect mobility and longevity.

A DEXA scan gives a clear, low-radiation look at bone mineral density, usually at the hip and spine. In a longevity plan, that matters...

Continuous Glucose Monitoring for Longevity: Setup, Accuracy, and Use Cases

Learn how continuous glucose monitoring supports longevity, including CGM setup, accuracy limits, glucose metrics, food testing, exercise timing, and practical use cases.

Continuous glucose monitoring gives a moving picture of how your body handles food, exercise, sleep, stress, and daily routines. Instead of a single fasting...

Coronary Artery Calcium for Longevity: Score, Risk, and Follow-Up

Learn how coronary artery calcium scoring helps assess heart disease risk, interpret CAC score ranges, guide prevention, and plan follow-up for longevity.

Coronary artery calcium testing gives a direct look at calcified plaque in the arteries that feed the heart. That makes it different from standard...

Functional Longevity Tests: Grip, Gait Speed, and Sit to Stand

Learn how grip strength, gait speed, and sit-to-stand tests reveal functional longevity, mobility reserve, fall risk, and real-world strength as you age.

Grip strength, gait speed, and sit-to-stand performance give a fast, low-cost picture of how well the body turns muscle, balance, coordination, and energy into...

Genetics in Longevity: APOE, Pharmacogenomics, and What’s Actionable

Learn how APOE, pharmacogenomics, and actionable genetic findings fit into a longevity plan, including medication safety, dementia risk, screening, and family testing.

Genes shape risk, drug response, and family health patterns, but they rarely give a complete forecast. In longevity work, a genetic result is most...

Home Blood Pressure for Longevity: Proper Measurement and Targets

Learn how to measure home blood pressure accurately, choose a validated monitor, interpret averages, understand targets, and use readings to protect long-term heart, brain, and kidney health.

Blood pressure is one of the most useful at-home health signals because it reflects the daily load placed on arteries, the heart, kidneys, brain,...

Inflammation Markers for Healthy Aging: hs-CRP and Beyond

Learn how hs-CRP and other inflammation markers fit into healthy aging, cardiovascular risk, metabolic health, frailty prevention, and practical follow-up testing.

Inflammation is not automatically bad. It repairs tissue, fights infection, and helps the body respond to injury. The problem is persistent, low-grade inflammation that...

Iron and Ferritin: Interpreting the Panel Without Overdoing It

Iron and ferritin: Learn to read labs—ferritin, TSAT, TIBC—spot deficiency vs overload, avoid pitfalls, and know when to supplement or see a specialist. Now.

Iron status affects oxygen delivery, energy production, brain function, exercise tolerance, restless legs, hair shedding, pregnancy, and several chronic diseases. It also has a...

Kidney Health in Healthy Aging: eGFR and Albumin-to-Creatinine Ratio

Learn how eGFR and albumin-to-creatinine ratio reveal kidney filtration, albumin leakage, aging-related risk, testing frequency, and practical kidney protection steps.

Kidney health rarely gets attention until a number looks abnormal. That is a mistake. The kidneys help control blood pressure, fluid balance, mineral balance,...

Lipids for Longevity: ApoB and Non-HDL as Primary Markers

Learn why ApoB and non-HDL cholesterol are stronger longevity-focused lipid markers than LDL alone, how to test them, what ranges mean, and how to lower risk.

A longer, healthier life depends heavily on keeping arteries open, flexible, and well supplied. Blood lipids matter because atherosclerosis builds quietly for decades before...

Lipoprotein(a) and Longevity: Who Should Test and What Levels Mean

Learn who should test lipoprotein(a), what Lp(a) levels mean, why high Lp(a) affects longevity, and what to do when this inherited heart risk marker is elevated.

Lipoprotein(a), usually written as Lp(a) and pronounced “L-P-little-a,” is one of the most overlooked cardiovascular risk markers in preventive health. It is mostly inherited,...

Microbiome Testing for Longevity: When It Helps and When to Skip

Microbiome testing for longevity is useful only with a clear question. Learn when stool tests help, when to skip them, and what gut health actions matter most.

The gut microbiome is linked with digestion, immune signaling, metabolism, inflammation, and medication response. That makes microbiome testing sound like a shortcut to a...

NAFLD Screening for Longevity: ALT, AST, FIB-4, and Ultrasound

Learn how ALT, AST, FIB-4, ultrasound, and elastography fit together for NAFLD and MASLD screening, fibrosis risk, and long-term metabolic health.

Fatty liver disease is one of the most useful metabolic warning signs to look for before symptoms appear. A person can feel well, have...

OGTT vs Mixed-Meal Test: Choosing a Glucose Challenge

Compare OGTT and mixed-meal testing for glucose, insulin, CGM patterns, diabetes risk, and real-life meal response so you can choose the right metabolic test.

An OGTT and a mixed-meal test both ask the same broad question: how well does your body handle a glucose challenge? The difference is...

Omega 3 Index for Longevity: Testing and Targets

Learn what the Omega-3 Index measures, what target range supports healthy aging, how to test correctly, and how to raise low EPA and DHA status safely.

The Omega-3 Index is a blood test that shows how much EPA and DHA—the long-chain omega-3 fats found mainly in fatty fish and algae—are...

Resting Heart Rate and HRV for Healthy Aging: What to Track

Learn how resting heart rate and HRV reflect recovery, fitness, stress, sleep, illness, and healthy aging, plus what trends to track and when to get checked.

Resting heart rate and heart rate variability give you a daily window into cardiovascular fitness, recovery, stress load, sleep quality, and early signs that...

Sleep and Wearables for Longevity: What to Trust and What to Ignore

Learn which sleep wearable metrics matter for longevity, which sleep-stage numbers to ignore, and when sleep tracking should lead to medical testing.

Sleep tracking has moved from sleep labs into watches, rings, phones, mats, and smart beds. That is useful, but it also creates a trap:...

Thyroid Checkpoints for Longevity: TSH, Free T4/T3, and Patterns

Use TSH, free T4, free T3, and thyroid lab patterns to interpret thyroid function for longevity, avoid false alarms, and know when results need follow-up.

The thyroid is small, but its signal reaches almost every tissue. It helps set resting energy use, heart rate, temperature, cholesterol handling, bowel speed,...

Triglycerides to HDL Ratio: Simple Signal for Metabolic Healthspan

Learn how to calculate and interpret the triglycerides to HDL ratio, what high values suggest about insulin resistance and metabolic health, and how to improve it.

The triglycerides to HDL ratio is a quick signal of how well your body handles fat, carbohydrates, insulin, and stored energy. It is not...

Uric Acid and Longevity: When Numbers Matter

Understand uric acid as a longevity biomarker, including healthy ranges, gout risk, kidney and metabolic links, testing tips, and when high numbers need action.

Uric acid is easy to overlook because it usually sits near the bottom of a routine lab report. Yet it carries useful information about...