@SueJB Hi! I switched to soy (and only soy, no extra ingredients or modifications made in a fancy non-food factory) in 1994, when I gave up casein. I drink soy milk and ate tofu at that time, already not eating any meat except "turkey at Thanksgiving and chicken if I have to", and not buying much fish to cook because the kids didn't like it. In 1997 my mother was dx with breast cancer, and told me some years later that she'd found out it had been estrogen-receptor positive, so I limit my intake of soymilk (unsweetened, soybeans+water only) to about 8 oz a day and don't eat tofu. I am leery of
any foods which have been processed any more than washing, chopping etc, cooking with no additional ingredients-- you get the idea, and soy isoflavone sure sounds processed to me!