When it comes to cancer, specialists have long known that some cancer cells tend to thrive more in certain conditions than others.

For instance, some cancer cells are more vulnerable to direct light and heat, while others thrive in low-oxygen environments. While there is still much to learn about how cancer cells operate and respond to various stimuli, there is some evidence to suggest that breast cancer cells may be more active at night.

What Are Circadian Rhythms?

The human body has a natural internal clock, also known as a circadian rhythm. These rhythms help to regulate when we feel tired or awake, when we get hungry, and even when we are most productive.

This internal clock is set by external cues, such as the rising and setting of the sun, which help to regulate our sleep-wake cycles.

While many people know about the sleep-wake aspect of circadian rhythms, these rhythms also have an impact on the functioning of our organs and cells.

In fact, studies have shown that there are specific genes that are regulated by circadian rhythms, and when these rhythms are disrupted, it can increase the risk of certain diseases, including cancer.

The Connection Between Circadian Rhythms and Breast Cancer

Research has shown that breast cancer cells may be particularly sensitive to disruptions in circadian rhythms.

According to a study published in the International Journal of Cancer, breast cancer cells that were exposed to light during the nighttime hours showed higher levels of activity than those that were exposed to light during the daytime.

While the exact reason for this is not yet clear, scientists believe that it may have to do with melatonin, a hormone that is produced by the pineal gland during sleep.

Melatonin has been shown to have anticancer properties, which may help to slow down the growth and spread of cancer cells. When circadian rhythms are disrupted, however, the body may not produce enough melatonin, which could allow cancer cells to proliferate more quickly.

What Can You Do?

While much more research is needed to fully understand the connection between breast cancer and circadian rhythms, there are several steps that you can take to support your body’s natural rhythms and potentially reduce your risk of cancer.

The first step is to make sure that you are getting enough high-quality sleep.

Aim for at least seven hours of sleep each night, and create a sleep-friendly environment by turning off electronics and using blackout curtains or an eye mask to block out light.

You can also support your circadian rhythms by getting regular exercise, eating a healthy diet, and avoiding exposure to bright light during the nighttime hours.

Additionally, it may be helpful to talk to your doctor about strategies for managing stress and improving your sleep quality.

Conclusion

While there is still much to learn about how breast cancer cells operate and respond to various stimuli, research suggests that circadian rhythms may play a role in cancer development and growth.

By taking steps to support your body’s natural rhythms, you may be able to reduce your risk of breast cancer and other diseases.