Why DNA Extraction from Inhibitor‑Rich Environmental Samples Is So Challenging

Environmental DNA (eDNA) analysis is widely used in microbiome research, environmental monitoring and ecological studies. However, extracting high-quality DNA from inhibitor-rich environmental samples such as soil, sludge and water filters remains a major technical challenge.
This article explains why environmental DNA extraction is inherently difficult, how PCR failure is often a downstream symptom of inhibitor interference,and what key factors should be considered to improve reproducibility in eDNA workflows.