For me it was quite personal. I had stage 2 bladder cancer, which has a low survival rate and high recurence.
I started taking high doses of absorbable curcumin along with high doses of vitamin C and after 4 month of chemotherapy both my doctors still wanted to remove both my bladder and prostate. I asked for biopsy. It came back cancer free and still am.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5494770/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7312715/
https://www.cancer.gov/about-cancer/treatment/cam/hp/curcumin-pdq
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7446227/
https://bmccancer.biomedcentral.com/articles/10.1186/s12885-020-07256-8