Recently, a paper has been published in one of the best scientific journals, Science, indicating that "Cysteine depletion induces pancreatic tumor ferroptosis in mice" https://science.sciencemag.org/content/368/6486/85.full

There are two major ways to induce Cysteine deplition:

1. by halting the import of that inside the cells, and that can be done with an accessible and cheap FDA approved drugs https://www.cancertreatmentsresearch.com/cancer-addiction-to-cystinecysteine-another-piece-in-the-puzzel/

2. by reducing Methionine intake in the diet (reduce eggs, meat, and fish, sesame seeds) which is converted in Cysteine inside cells.

An entire strategy that fits with this approach and will likely increase the effectiveness is discussed here https://www.cancertreatmentsresearch.com/modulating-the-yin-and-yang-energy-of-cells-to-fight-cancer-pro-oxidant-strategy/