Biomarkers Table

Complete guide to blood biomarkers for optimal health and longevity

Normal vs Optimal

“Normal” values reflect the middle of the population but are not always optimal for longevity.

Tracking Over Time

A single test isn’t conclusive; trends over time are more meaningful.

Proactive Prevention

Chronic disease risk can be reduced by monitoring and managing biomarkers.

Cardiovascular

(6 biomarkers)
BiomarkerNormal RangeOptimal RangeRisk RangeInfo
Apolipoprotein B (ApoB)
<90 mg/dL
<60 mg/dL
Elevated levels
Blood Pressure
<120/80 mmHg
110-115/70-75 mmHg
>130/80 mmHg
HDL Cholesterol
>40 mg/dL (men)
>60 mg/dL
Low levels
Homocysteine
<15 μmol/L
<10 μmol/L
Elevated levels
Lipoprotein(a) [Lp(a)]
<30 mg/dL
<14 mg/dL
Elevated levels
Triglycerides
<150 mg/dL
~50 mg/dL
>100 mg/dL (increased risk)

Diabetes

(2 biomarkers)
BiomarkerNormal RangeOptimal RangeRisk RangeInfo
Fasting Glucose
70-90 mg/dL
70-90 mg/dL
>100 mg/dL (pre-diabetes), >125 mg/dL (diabetes)
Hemoglobin A1c
4.5-5.5%
4.5-5.5%
>5.8% (pre-diabetes), >6.5% (diabetes)

Heavy Metals

(1 biomarker)
BiomarkerNormal RangeOptimal RangeRisk RangeInfo
Lead
<5 μg/dL
<1 μg/dL
>10 μg/dL

Inflammation

(1 biomarker)
BiomarkerNormal RangeOptimal RangeRisk RangeInfo
C‑Reactive Protein (CRP)
<3 mg/L
As close to zero as possible
>0.2 mg/L (increased risk)

Metabolic

(1 biomarker)
BiomarkerNormal RangeOptimal RangeRisk RangeInfo
Waist Circumference
<102 cm (men)
<94 cm (men)
>102 cm

Key Points to Remember

Disease Progression

Chronic diseases develop slowly over time. For example, diabetes can progress from normal values (70–90 mg/dL) to pre‑diabetes (>100 mg/dL) and then to diabetes (>125 mg/dL) over years. Regular monitoring helps reverse the trend.

Balanced Approach

Optimal health requires balance across biomarkers. It’s better to have all markers in decent ranges than some perfect and others poor. Aim for a balanced lifestyle.

Biomarker Fluctuations

Some biomarkers fluctuate considerably. Inflammatory markers vary with infections, heavy metals with exposure, and hormones with sleep and stress. Repeating tests is essential to identify patterns.

Action Based on Results

Blood tests matter when you act on them. Commit to lifestyle changes informed by your biomarkers to lower all‑cause mortality risk.

“No one is destined to develop diabetes, heart disease, or kidney disease. You can measure your current risk and, by controlling these blood markers, significantly reduce it.”

Data based on analysis of 50+ blood tests and optimal longevity research

Source: Siim Land – “I've taken over 50 blood tests in my life”
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Optimal Biomarkers — Complete Longevity Guide | ProtocolsPro