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Nutrition and Fitness
Ask an Expert: Nutrition
Click here to ask Brennan J. Robertson a question about nutrition
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Question Archive
What are good dietary sources of Vitamin D?
Brennan J. Robertson's Response
Vitamin D has been the focus of a great deal of media attention lately with recent findings suggesting that those that are deficient in the sunshine vitamin may be at a higher risk of developing colon and breast cancer. Low levels of vitamin D also appear to be associated with a higher risk of heart attack in men. In light of its apparent health benefits, the Canadian Cancer Society recommends that non-white adults take 1,000 IU daily year round. White adults are recommended to take that same amount in fall and winter, when less daylight causes a decline in our bodies' production of vitamin D.
The Dietary Reference Intake for adequate intake (AI) of Vitamin D for infants, children, men, and women aged 19 to 50 is 5 µg/day (200 IU/day). Because there are few natural sources of dietary vitamin D, often limited to fatty fish such as salmon and fish liver oils, most of the vitamin D intake in developed countries is from fortified foods such as milk, soy milk, and breakfast cereals. Mushrooms have been shown recently to provide vitamin D if exposed to UV light after being harvested, and eggs contain small amounts as well.
Click here to ask Brennan J. Robertson a question about Nutrition
- A friend told me that a vitamin D supplement will help in avoiding the winter blues. Is this true?
- Are bananas fattening?
- Are pineapples high in calories?
- Are there any foods I should be eating more of to ward off the common cold?
- Can you explain to me the difference between "good" carbs and "bad" carbs?
- Do fruits and vegetables have protein?
- Hello Brennan! I have type 2 diabetes, and I'm wondering if all the hype about vitamin supplementation is in fact beneficial for my condition?
- How beneficial is the Eat Right 4 Your Type diet?
- I am a student on a low budget. How can I eat healthy?
- I currently take a water pill daily and I am concerned about the amount of potassium my body is losing as a result of taking this pill. What fruits and vegetables with high levels of potassium should I be eating more of to offset this loss?
- I have been considering the benefits of a dietary detox. What can you tell me about body cleanses?
- I have known about the benefits of drinking gogi juice but just recently heard of the açai berry. What is it and how would it benefit my health?
- I want to start taking an omega-3 supplement as I don't like fish. You had recommended one with a high EPA. How high should I go, and can you recommend a brand? I'm new to supplements!
- Is honey a good substitute for sugar for a person with diabetes?
- My daughter has colitis and has been advised to follow a low-fibre diet. Which foods should she eat and which should she avoid?
- My New Year's resolution is to take better care of my body. Is there anything you can suggest to kick start a year of healthy living?
- My sister has liver disease. Is there a certain diet she should follow?
- My son has been drinking a juice that claims to be loaded with adaptogens. What are adaptogens and are they safe to take?
- What are probiotics and should I be taking them regularly?
- What exercises will help me build upper arms after losing 20 pounds over one year? I golf and bike from April to November, then walk every day during the inclement weather.
- What foods are good for someone with irritable bowel syndrome (IBS) and which foods should be avoided?
- What is organic produce and is it more nutritious than conventional produce?
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