@Halla, unfortunately I don't specifically. I seem to remember it was on a site from an American University or cancer, like Sloane Kettering, Johns Hopkins or one of the other bigger ones. The subject came up where a member had a laundry list of supplements she was taking such as curcumin, collagen, lecithin, vitamin this, that and the other and a diet containing a lot of soy. Another member posted a link to this other site which had all the vitamins, minerals and so called 'natural' supplements and how they related to breast cancer.