Blog Article Archive

Night-time Screen-time and Cancer Risk


Among non-communicable diseases, cancer is the leading cause of morbidity and mortality worldwide. It is estimated that in 10 years, the number of new cases diagnosed per year will approximately double. If there was a simple change you could make in your life that would reduce your risk of developing cancer would you do it?


Most of us are familiar with reducing our animal product intake, increasing our physical activity, taking our vitamin D, reducing exposure to chemicals in our homes, but what about reducing your screen time, particularly at night? Most of our digital devices emit what is called blue light. Blue light has a shorter wavelength than other colours in the visible spectrum, and is not restricted from entering the eye, like other wavelengths are, therefore is able to cause more damage.


Before the invention of the lightbulb, humans were exposed to insignificant amounts of light at night. As the sun sets a small gland in our brain starts to make hormone called melatonin, which helps us fall asleep and stay asleep, among other things. Today, we are exposed to artificial light nightly from street lights that shine into our bedroom window, cellphones, laptops, tablets, LED lights, fluorescent lights, you get the idea. There is no need to conduct our lives according to the sun and moon cycle anymore. This means our circadian rhythm gets disrupted, especially in those who work shiftwork.  Exposure to artificial light at night increases your risk of cancer by suppressing melatonin production. Melatonin is an antioxidant that protects us from dangerous reactive oxygen species (ROS).  When our melatonin levels are insufficient, ROS increase in circulation and damage our DNA. If not repaired by intrinsic cellular mechanisms, it will lead to cancer. Another mechanism by which low levels of endogenous melatonin increases cancer risk is via reproductive hormones. Sufficient levels of circulating melatonin actually inhibit the synthesis of estrogen and interfere with estrogen binding at cellular estrogen receptors. This means that insufficient levels of melatonin result in greater risk of hormone responsive cancers like breast, prostate, uterine and ovarian.


Large scale studies have found 1.5-2.0 fold increased risk of cancer in countries with more artificial light pollution, even after statistics were adjusted for age, population size, air pollution, and electricity consumption. I certainly don’t believe this is the only cause, but it is a contributing factor.


How do we fix this? Well, once the sun sets it’s a good idea to start dimming the lights in your home. Candles make a great natural light source. Use light bulbs with a wavelength emission peak of 470-480nm, instead of those with a peak below 450nm. Spend more time outside exposing your eyes to natural light. Reducing screen time after dinner, and completely shutting down electronics an hour or two before bed is also important. I’ll be the first to admit that I regularly use my computer after dark, especially in the fall and winter, to do research, or write things like this article. Thankfully there are glasses you can wear to reduce your exposure to blue light. My favourite is Ladyboss Glasses (no, I do not work for the company). You can also turn on the night setting on your mobile device during the day.


While the use of indoor lighting and mobile devices has certainly allowed humans to accomplish much more in a day, it is also important for us to do nothing once in a while, to step back from the hustle of the day and relax.


Dr. Brenda Tapp ND


Don’t Believe Everything you Read

As you make purchases for your home library or search the Internet, keep in mind that not all information is written by qualified medical experts. Your doctor or a health organization may be able to recommend some good books or helpful Internet sites. When looking for health information on the Internet, don’t believe everything you see. Articles published in peer-reviewed medical journals are checked for accuracy, but anyone can put information on the Internet, so there’s no guarantee that the information you find is accurate or up-to-date. In addition, many companies set up Web sites primarily to sell their products. It may be helpful to ask a health professional about the information you find on the Internet, particularly before you buy any products. If you search and shop with care, you can add some medically sound reference materials to your home library and find accurate information on the Internet.

Use Information Wisely

It can be hard to judge the accuracy and credibility of medical information you read in books or magazines, see on television, or find on the Internet. Even people with medical backgrounds sometimes find this task challenging. Following are some important tips to help you decide what information is believable and accurate on the Internet.

The Internet

Compare the information you find on the Internet with other resources. Check two or three articles in the medical literature or medical textbooks to see whether the information or advice is similar.

Check the author’s or organization’s credentials. They should be clearly displayed on the Web site. If the credentials are missing, consider this a red flag. Unfortunately, there are many phony doctors and other health professionals making false claims on the Internet.

Find out if the Web site is maintained by a reputable health organization or reviewed by board certified doctors. Remember that no one regulates information on the Internet. Anyone can set up a home page and claim anything.

Check for the Web sites Editorial Policy. Web sites that provide health or medical information should have a Medical Editorial Board and an Editorial policy (that includes peer review by their doctors).

Be wary of Web sites advertising and selling products that claim to improve your health. More important, be very careful about giving out credit-card information on the Internet (check to see if they have a secure database such as VeriSign™). Further, even if nothing is being sold on a Web site, ask yourself if the site host has an interest in promoting a particular product or service.

Ask yourself whether the information or advice seems to contradict what you’ve learned from your doctor. If so, talk to your doctor to clarify the differences in the information.

Be cautious when using information found on bulletin boards or during “chat” sessions with others. Testimonials and personal stories are based on one person’s experience rather than on objective facts or proven medical research.

To Make Informed Decisions About Your Health Care, You Need to Understand Your Health Problem

Medical information, especially material written for health care providers, can be hard to understand, confusing, and sometimes frightening. As you read through your materials, write down any words or information you don’t understand or find confusing. Make a list of your questions and concerns. During your next office visit, ask your doctor, nurse, or other health professional to review the information with you so that you understand clearly how it might be helpful to you. If the medical information you gathered is for a personal health problem, you may want to share what you found with your spouse, other family members, or a close friend. Family members and friends who understand your health problem are better able to provide needed support and care. Finally, you might want to consider joining a support group in your community. You may find it helpful to be able to talk with others who have the same health problem and share your feelings or concerns.

Ultimately, the information you gather from print and electronic resources can help you make decisions about your health care–how to prevent illness, maintain optimal health, and address your specific health problems. Armed with this knowledge, you can more actively work in partnership with your doctor and other health care professionals to explore treatment options and make health care decisions. Health care experts predict that today’s computer and telecommunication systems will result in a new era–the health care system information age–built around health-savvy, health-responsible consumers who are the primary managers of their own health and medical care.

The above information has been provided by the National Institutes of Health, Department of Health and Human Services, and Society for Integrative Oncology.

Yummy Brownies

Who doesn’t like brownies? These are vegan friendly and can be adapted to suit what you have available or what you like best.

Yield: Makes 16 brownies.


  • 1/3 cup melted ghee or unsalted butter
  • 1 cup unsweetened applesauce
  • 3/4 cup cocoa or carob powder
  • 1/4 tsp salt
  • 1 cup unrefined sugar
  • 1 small ripe banana, mashed
  • 1 1/3 cup spelt flour
  • 1/2 cup sunflower seeds, coconut, carob chips or walnut pieces


  1. Preheat oven to 350°F. Lightly grease 8-inch square pan.
  2. In large bowl, beat all ingredients with fork until smooth. Pour into prepared pan. Bake 1 hour or until toothpick inserted in center comes out clean. Cut into squares when cool.

Variation: For gluten-free brownies, replace spelt flour with 1 cup brown rice flour, 1/4 cup amaranth flour and 1 tsp arrowroot flour.

Recipe Source: Thirteen Moons by Louis Racine

Coconut Curried Chowder

This chowder has a beautiful colour and sweet taste.

Yield: Serves 4.


  • 2 tsp ghee or oil
  • 2/3 cup chopped onion
  • 3 chopped green onions, white and green parts separated
  • 1 cup peeled diced sweet potato
  • 1/3 cup diced red pepper
  • 3 tsp grated ginger root, divided
  • 2 cloves garlic, chopped
  • 2 cups vegetable broth
  • One can (14 oz) light coconut milk
  • 1/2 cup frozen or fresh corn kernels
  • 2 1/2 tsp curry powder (or more to taste)
  • 1/2 tsp grated lemon zest
  • 1/8 tsp cayenne (optional)
  • 1/4 tsp sea salt
  • 1 block (16 oz) extra-firm tofu, drained and pressed*, cut into bite-sized cubes
  • 2 tbsp chopped fresh cilantro (optional)


  1. In large pot, heat ghee or medium-low heat. Add onion and white part of green onions. Saute 2 minutes. Add sweet potato, red pepper, 2 tsp ginger root and garlic. Saute 3 minutes. Stir in broth and heat until boiling. Reduce heat to low, cover and simmer 10-15 minutes or until sweet potato is tender.
  2. Add coconut milk, corn, curry powder, lemon zest, cayenne, salt, remaining 1 tsp ginger root and green onions. Gently stir tofu into mixture. Remove from heat and let stand for at least 30 minutes to allow tofu to absorb seasonings.
  3. Just before serving, reheat soup over low heat (do not boil). Stir in cilantro, if desired, and serve.

*Draining and pressing tofu: Cut brick of tofu in half lengthwise to make 2 slabs. Cover a cutting board with foil and prop it up slightly so that it slants and drains into sink. Place tofu slabs on board. Cover tofu with another piece of foil and place baking sheet on top. Weigh it down with cans or books and let stand 20 minutes.

Recipe Source: Thirteen Moons by Louis Racine