---
title: "Estimated Glomerular Filtration Rate (eGFR CKD-EPI) Optimal Range vs Lab Normal (2026 Clinical Decoder & Protocol) | Nutrition Research Labs"
source_url: "https://nutritionresearchlabs.com/biomarkers/egfr-creatinine"
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description: "Decode your Estimated Glomerular Filtration Rate (eGFR CKD-EPI) (eGFR) blood test: Longevity Optimal Target (95–125 mL/min/1.73m²) vs Standard Lab Normal (60–125 mL/min/1.73m²), assay interference, and Grade-A clinical protocols."
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---

> **Canonical Source:** [https://nutritionresearchlabs.com/biomarkers/egfr-creatinine](https://nutritionresearchlabs.com/biomarkers/egfr-creatinine)
>
> *Decode your Estimated Glomerular Filtration Rate (eGFR CKD-EPI) (eGFR) blood test: Longevity Optimal Target (95–125 mL/min/1.73m²) vs Standard Lab Normal (60–125 mL/min/1.73m²), assay interference, and Grade-A clinical protocols.*

## Reference Range Comparison (mL/min/1.73m²)

- **Longevity & Metabolic Optimal Range:** 95 – 125 mL/min/1.73m²
- **Standard Lab Reference Interval ("Normal"):** 60 – 125 mL/min/1.73m²
- **Why Standard Lab Ranges Mislead Patients:** Labs categorize any eGFR above 60 as
- **Pre-Draw Supplement Assay Interference Warning:** Consuming cooked red meat or taking creatine monohydrate within 48 hours of testing directly elevates serum creatinine, dropping calculated eGFR by 15-25 points without any change in actual kidney function.

## Decode the Next Biomarker on Your Blood Panel

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