Just curious-how can I prevent breast cancer

In reviewing the article called "Eyes on the Prize", I became interested in how can I as a 32 year old woman prevent breast cancer. With an already weakened immune system because I have no spleen, I have always looked into vitamin supplements and just recently into more nutritious foods. I came across the below foods that could help:

http://www.naturalhealthweb.com/articles/maher2.html

I am a true geek so I posted these on my fridge. I love veggies so this isn't too bad. Also I just heard from my cousin who is in nursing school that Vitamin D3 5000 IU are great for your immune system! If you have a child they also make these in gummy style.

I used to hate the idea of Green Tea but now there are so many flavors added to green tea that make the experience wonderful. My mother made me hot green tea with mango last night and I absolutley LOVED it. I also like cold green tea with citrus. Anyone have any flavors they would like to share? I would love to try new ones~