Noor, S.J. and Enas, J.K. 2025. Optimization of ultrasonic-assisted extraction and in vitro determination of the cytotoxic effect of ethyl acetate fraction of wild Amaranthus viridis on SKGT-4, AGS and A431 cell lines. Plant Science Today. 12, 4 (Nov. 2025). DOI:https://doi.org/10.14719/pst.9326.