watch this lecture by Dr. McDougall please: https://www.youtube.com/watch?v=4UPDxIQY33M
The first couple of minutes you can skip since he's just with his wife talking about some trip, but the rest is very very useful. good luck.
Breast lumps are actually deposits of calcium. They CAN develop cancer and the reason they do this is because the calcium cuts off the flow of blood to an area and this creates an anaerobic environment that is just the right condition that cancer needs to thrive. I've always wondered if you could dissolve breast lumps the same way you dissolve kidney stones and arterial plaque (both of these have a lot of calcium in them) - with a diet high in lemonade.