Why the importance of geo-origin tracing of edible bird nests is arising? (vol 150, 110806, 2021)

•EBN global demand is increasing due to its high nutritional, medicinal and economic value.•Nutrients and therapeutics content of EBNs vary depending on their geo-origins.•Current techniques used for geo-tracking EBNs fail to discriminate their quality grades.•A new, accurate and universal geo-traceability technique of EBNs is critically needed.•PCR-DGGE could be a potent tool to differentiate geo-origins and quality grades of EBNs.