As of 2015, there is no evidence to support any connection between consuming a high-alkaline diet and the incidence of cancer, according to WebMD. However, a high-alkaline diet is generally high in plant foods and low in meat, which may be helpful in maintaining good health.
The body tightly regulates the acid-alkaline balance of the blood, according to the Canadian Cancer Society.. While individual foods have varying acid content, a high-alkaline diet does not influence the pH of the blood. There is also no evidence that cancer is caused by high levels of acid in the body.
There is some evidence that low-acid foods protect against kidney stones and lower the risk of colon cancer and Type 2 diabetes, but more research is needed, states WebMD.