From the Lab to the Kitchen: A Critical Review of Low-Cost DNA Extraction Methods and the Quest for Truly Household-Based Protocols

From the Lab to the Kitchen: Review of Low-Cost DNA Extraction Methods

Abstract

Commercial DNA extraction kits are too expensive and scarce, hence affordable alternatives are needed. This is especially true in low-resource contexts. Despite recent advances using basic kitchen reagents like dish soap, salt, and vinegar, this review argues that a truly household-only protocol remains impractical. We examine low-cost hybrid methods that use some lab-grade chemicals and regular laboratory methods and critically evaluate the spectrum of intermediary low-cost solutions. We demonstrate that from certain simple animal tissues (e.g., fish mucus, blood). We show that these methods can achieve yields and purity levels suitable for basic PCR under certain conditions. Sequencing, standardization, repeatability, and validation remain difficult in complex systems. This analysis shows that researchers should shift from proof-of-concept studies to systematic creation, optimization, and validation of home-implementation approaches. Obtaining this molecular biology "holy grail" is essential for democratizing genetic tools in biology, worldwide education, and citizen research.