2. Get your vitamin D
The higher the levels of vitamin D in the blood, the lower the risk of developing colorectal, breast and prostate cancers, according to the latest research. The Canadian Cancer Society recommends a daily vitamin D supplementation of 1,000 IU during the fall and winter months with special consideration for adults at risk for having a deficiency. In warmer and brighter months, you can get your vitamin D through sun exposure: a few minutes a day or more, depending on your age, the time of day and your skin colour.