The 4 Blood Tests That Tell You
More About Your Real Age Than Any Mirror

Your reflection shows surface aging. Your blood shows cellular truth. IL-6, CRP, GGT, and HbA1c reveal what's actually happening at the biological level — and most standard panels miss all four. Here's what each measures, what optimal actually looks like, and how to get tested.

What your annual physical doesn't actually measure

A standard annual physical gives you a lipid panel, complete blood count, and basic metabolic markers. Useful tests — designed to catch illness. But they weren't designed to tell you how fast you're aging, or whether you're on a trajectory toward the conditions most likely to shorten your healthspan.

The biomarkers that best predict biological aging, cognitive decline, and all-cause mortality are a different list entirely. Well-validated across decades and millions of participants. Available at any major reference lab. Simply not on the default menu — because the default menu wasn't built with longevity medicine in mind.

The four tests below are not exotic. Available at LabCorp, Quest, or any major reference lab. Combined, they cost less than most people spend on supplements in a month. And the information they contain is qualitatively different from a standard panel — because they measure the processes that drive biological aging, not the damage already done.

40% of biological age variance explained by chronological age — 60% is modifiable

2.3× higher all-cause mortality at IL-6 >3.0 pg/mL in adults 50+ (Harris et al., JAMA 1999)

~$90 typical direct-to-consumer cost for all 4 tests through major reference labs

Four tests. Four different windows into how fast you're aging

Primary inflammaging signal Interleukin-6 IL-6 · pg/mL · serum Longevity-optimal < 1.0 pg/mL Elevated biological aging risk > 3.0 pg/mL The master signal of inflammaging — the chronic low-grade inflammation that silently accelerates biological aging. Produced by fat cells, immune cells, and senescent "zombie cells." Elevated levels predict cognitive decline, cardiovascular disease, and all-cause mortality more reliably than most standard markers. Rarely ordered routinely

Cardiovascular + systemic inflammation High-Sensitivity CRP hsCRP · mg/L · serum Cardiovascular protection zone < 1.0 mg/L High cardiovascular risk > 3.0 mg/L The high-sensitivity version detects inflammation at concentrations too low for standard CRP. Each doubling of hsCRP correlates with ~40% increased coronary risk (Danesh et al., NEJM 2004). Critical: confirm results are in mg/L not mg/dL — 0.8 mg/dL = 8.0 mg/L (high risk). Sometimes ordered with cardiac panels

Oxidative stress + liver burden Gamma-Glutamyl Transferase GGT · U/L · serum Optimal (low oxidative burden) < 20 U/L Elevated oxidative stress > 40 U/L The most underrated marker on this list. Typically checked for liver function — but its predictive value for mortality is independent of alcohol intake. Elevated GGT reflects glutathione depletion and oxidative burden, often rising years before clinical disease appears. A rare early warning window. Rarely ordered outside liver panels

Glycation + metabolic aging Hemoglobin A1c HbA1c · % · whole blood Longevity-optimal range 4.8 – 5.2% Accelerated glycation risk > 5.5% (pre-diabetic threshold: 5.7%) Your 90-day blood sugar average. Most doctors consider anything under 5.7% fine — but UK Biobank data and Peter Attia's framework consistently show lowest all-cause mortality in the 4.8–5.2% range. The difference between 5.2% and 5.6% compounds meaningfully across decades. Standard diabetes screening

Lab normal vs. longevity optimal — the gap that matters

Lab reference ranges are population averages — built to include people aging at typical rates. Longevity research consistently uses tighter targets. A person at IL-6 of 4.2 pg/mL is technically "normal." The longitudinal data shows that number predicts meaningfully accelerated biological aging versus someone at 0.8 pg/mL.

Biomarker	Lab "Normal"	Longevity Optimal	Elevated Risk	Source
IL-6	<7.0 pg/mL	<1.0 pg/mL	>3.0 pg/mL	Harris et al., JAMA 1999
hsCRP	<10 mg/L	<1.0 mg/L	>3.0 mg/L	Danesh et al., NEJM 2004
GGT	<55 U/L (M) / <38 (F)	<20 U/L	>40 U/L	Fraser et al., Lancet 2007
HbA1c	<5.7%	4.8 – 5.2%	>5.5%	UK Biobank / Attia M3.0

How to actually get these tests ordered

The barrier is simply knowing what to ask for. Many primary care physicians will order all four without hesitation if you frame it as a comprehensive longevity panel.

🏥 Ask your doctor Request "high-sensitivity CRP, IL-6, GGT, and HbA1c as part of a comprehensive longevity panel." Most physicians will order these. If asked why: proactive inflammaging monitoring.

🔬 Order directly Most US states allow self-ordered tests through LabCorp, Quest, Function Health, Marek Health, or InsideTracker — no physician required. All four tests: ~$80–$150 out-of-pocket. Results in 2–5 days.

📅 Timing and retesting Fast 8–12 hours before drawing. Avoid intense exercise 24 hours prior. Retest every 6–12 months when actively intervening — trajectory matters more than any single result.

What actually changes these markers

All four are highly responsive to lifestyle intervention. Unlike genetic risk, they're not fixed. They respond to diet, exercise, sleep, and targeted supplementation within weeks.

For IL-6 and hsCRP: Anti-inflammatory diet (Mediterranean, whole food), Zone 2 aerobic exercise (150–180 min/week), 7–9 hours quality sleep, and visceral fat reduction. Resveratrol, Berberine, and omega-3s all have supporting trial data for CRP reduction.

For GGT: Reflects glutathione status. Effective interventions: reducing processed food and alcohol, increasing cruciferous vegetables, and supplementing with reduced glutathione or NAC. Reduced Glutathione is one of IgniLongevity's eight compounds — included specifically for this pathway.

For HbA1c: Glycemic control through dietary composition, time-restricted eating, and post-meal walking. Berberine has the strongest supplement evidence — comparable to low-dose metformin in some trials. Also one of IgniLongevity's eight compounds.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Reference ranges reflect peer-reviewed longevity research literature. Individual results vary. Consult your physician before making health decisions based on biomarker testing.