Just seeing a bit on PubMed about Sweet Potato Greens (extract) and cancer fighting. A list of other articles/studies after the abstract.
Particularly prostate cancer.
https://pubmed.ncbi.nlm.nih.gov/23629419/
Polar biophenolics in sweet potato greens extract synergize to inhibit prostate cancer cell proliferation and in vivo tumor growth - PubMed
Polyphenolic phytochemicals present in fruits and vegetables indisputably confer anticancer benefits upon regular consumption. Recently, we demonstrated the growth-inhibitory and apoptosis-inducing properties of polyphenol-rich sweet potato greens extract (SPGE) in cell culture and in vivo prostate ..
https://pubmed.ncbi.nlm.nih.gov/23629419/