Evidence-Based Supplement & Herb Guides

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...

Vitamin D Status in Healthy Aging: How to Test and Interpret

Learn how to test and interpret vitamin D status for healthy aging, including 25(OH)D ranges, when testing matters, follow-up labs, safe supplementation, and common mistakes.

Vitamin D testing looks simple, but the result often creates more confusion than clarity. A single number—usually serum 25-hydroxyvitamin D—gets labeled “low,” “normal,” or...

Waist to Height Ratio and Waist Circumference: Simple At Home Metrics

Learn how waist-to-height ratio and waist circumference help track central fat, metabolic risk, and healthy aging with simple at-home measurement steps and interpretation ranges.

A tape measure gives you one of the most useful home signals for metabolic health: how much fat you carry around the middle. Waist...

Galactomannan: Evidence-Based Uses for Blood Sugar, Cholesterol, Gut Health, and Side Effects

Galactomannan is a family of soluble fibers found in several edible gums—most notably guar gum, fenugreek gum, and locust bean (carob) gum. In foods,...

Galacto-oligosaccharides: Health Benefits, How to Use, Optimal Dosage, and Safety

Galacto-oligosaccharides (GOS) are prebiotic fibers found in small amounts in some dairy products and made at scale from lactose. They pass through the upper...