# How is sleep related to cancer? There is some evidence to suggest that disrupted sleep patterns or a lack of sleep may increase the risk of certain types of cancer. For example, studies have found that shift workers who work at night may have a higher risk of developing breast and colon cancer. Additionally, people with insomnia or other sleep disorders may have an increased risk of developing cancer. It is not fully understood why sleep may be related to cancer, but it is thought that changes in the body's natural rhythms and hormone levels that occur with disrupted sleep may play a role. Sleep can also be affected by cancer and its treatment, as they can cause fatigue and disrupt sleep patterns. # Matt's notes on sleep: Sleep is obviously a strong contributor to our overall wellness. But in this cancer game, it's critical! If your sleep is poor, you will be at a distinct disadvantage going into the match against cancer. It's like hitting the playing field with your shoes untied. And during your sleep is when you score many of your points against your opponent. So let's make it good. More resources to come on this topic...but to start, do check out the page here on [melatonin](../3.%20Treatments/3.3%20%20Supplements/Melatonin.md), which has relevance both to good sleep, but also as anti-cancer supplement.