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Breast Cancer Blog: Do you sleep with lights on?

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Dec 5, 2005

Do you sleep with lights on?

Do you sleep with lights on?
Do you sleep with lights on? I can't sleep with lights on, but I have seen some of my friends sleeping with lights on. A friend of mine once told me that she is afraid of darkness and would always sleep with lights on. If you sleep with lights on may be it's better to change this habit because researchers say that exposure to bright light during sleep can promote breast cancer growth in women.

The researchers claim that this is the first study that provides evidence for connection between the biological activity and development of cancer in humans. Researcher David Blask and colleagues from Bassett Healthcare in Cooperstown collected blood samples from female medical students and testing and tested in breast cancer growing in rats.

Researchers say that the increase in breast cancer cell growth is related to melatonin production. Melatonin is produced by the pineal gland, which is a pea-size structure located at the center of the brain. Melatonin is produced at night during a normal sleep and this helps to regulate our sleep-wake cycles. This hormone production is responsible for the biological clock inside you.
Blask says that breast cancer tumors are suppressed when exposed to melatonin levels during the normal night sleep. A woman who work night shifts and sleep during the day doesn't make enough melatonin to inhibit breast cancer.

So if you are sleeping with lights on, then try to sleep without lights, and if you are sleeping with lights off try to completely darken your bedroom to preserve your share of melatonin.

Blask said that he focused this research on breast cancer because breast cancer cells like prostate cancer cells are known to be sensitive to melatonin. Blake's findings are due to be published in the forthcoming issue of the journal Cancer Research, one of the top cancer publications in the world.


Do You Read All Of Our Cancer Blogs?

Do You Read All Of Blogs?
Do you read all of the blogs published by Many of our bloggers are busy keeping you updated on the various health related topics. We publish the following blogs at this time.

Cancer blog: I manage the cancer blog with lots of help and support form other bloggers. Through this cancer blog my friends and I try to bring stories of hope for patients with cancer. The cancer blog often republishes important blog posts from other cancer related blogs at If you are searching for a blog that covers wide variety of cancer topics, this may be the one for you.

Breast cancer blog: Breast cancer blog is run by Emily and other bloggers and they bring you the latest stories, news and events that are related to breast cancer. Increasing awareness about breast cancer among women and in the general population is the main goal of this breast cancer blog.

Lung cancer blog: Lung cancer blog is managed by Scott with the help of other bloggers. Through this blog Scott and his friends constantly remind the readers about the dangers of smoking. It's a never-ending struggle against this miserable disease with which a social stigma of smoking is associated.

Colon cancer blog: Colon cancer blog is run by Sue and other bloggers. Sue brings a personal touch to the colon cancer blog since her mother died of colon cancer few years ago. She writes about stories, research news and advances in treatment related to colon cancer.

Prostate cancer blog: Prostate cancer is the most common cancer among American men. American Cancer Society estimates that over 230,000 new cases of prostate cancer occur in the United state every year. This important blog about prostate cancer is run by Mark and other bloggers. This blog brings news, stories, and other personal observations related to prostate cancer. publishes a diabetes watch blog and this blog is run by JoAnn other bloggers. This diabetes watch blog brings you the latest in the field of diabetes. This includes personal stories, advances in diagnosis and treatment, and other observations about diabetes. Improving awareness about diabetes is an important mission of this group.


Breast cancer
Every year, more than 200,000 women are diagnosed with breast cancer in the United States. Breast cancer ranks second as the leading cause of cancer deaths in American women. Until recently breast cancer topped the list of leading causes of cancer deaths in women, but lately lung cancer has claimed the top position. If skin cancer is excluded, breast cancer is the commonest cancer among American women.

Breast Cancer Blog: Do you sleep with lights on?

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