A diet will not work like a bullet for cancer patients but in a long run, it will help them. Mostly plant based diet is suggested.This includes fruits, vegetable, lean protein and whole grains. Non-vegetarian diet is strongly discouraged.
There have been many controversies regarding the consumption of sugar, soy and organic meats. Though the consumption of alcohol has not shown any direct effects it causes several other related disorders hence has to be stopped completely. As antioxidants are known for cell rejuvenation. Hence food substance rich in Vitamin C, Vitamin E, Carotenoids.
There has not been a clear role of fat in Breast Cancer but avoiding fatty food is always a better option. During cancer lot, many medicines are taken and liver helps them digest. Further consumption of fat will increase the load on the liver and also the body weight which has to avoid.
Fibres can be added to the diet. Fibres are known to lower the risk of cancer. The good source of fibers is beans, vegetables, whole grain and fruits.
There is another thing called Flaxseeds. These are high in omega -3 fatty acids and phytoestrogen lignans. As per the experiments in a lab in has slowed down the progress of cancer.