Frequently Asked Questions
Beth Mansfield - Nutritionist

healthy weights | nutrition | vegetarian | fasting | eating disorders |

NUTRITION

Any "medical" situation requires that you make an appointment to meet with a Registered Dietitian to review your condition, your needs, and then design a nutrition plan for your specific condition and needs. You can locate one near you by consulting www.dietitians.ca

Other Questions and answers

When I exercise, be it weights, sprints or any exercise that's high
intensity, I get a headache, feel like passing out.

I would encourage you to push for a rationale from your doctor(s) as to
the nature on your fainting as this is not a normal response to exercise. You
could also review your eating habits as a very low calorie and/or fluid intake could also play a role.

Do vitamins have to be taken in the middle of a meal for proper absorption or can they be taken alone before bedtime?
For proper absorption, fat-soluble vitamins such as vitamins A,D,E,K should be taken right before a meal; whereas water soluble vitamins such as vitamin C and all the B vitamins should be taken right after the meal.

I know that you need magnesium to absorb calcium. When orange juice has calcium added, is ther magnesium also added? If there is no magnesium, does absorbtion take place?
While magnesium is an important component of bone it does not help much with absorption of calcium from foods. It is the Vitamin C in the orange juice and the Vitamin D in milk that helps the calcium to be absorbed from these foods. An adequate calcium intake is only one important component for buidling healthy bones. Daily phuysical activities are also important - so get on the move with healthy eating and active living!

Are sports drinks actually good for you when you are exercising under an hour?
Sport drinks are a great way to get sufficient fluid and electrolytes in during physical activities. Even when you are exercising for under an hour they can help improve your endurance performance. However they do have calories so if you are trying to maintian a healthy weight you may prefer to choose water instead when your exercise bouts are shorter than an hour in duration.

My hubby age 53 is overweight and is not working. He has high
cholestrol, so Dr. said no cheese and no red meats. He would follow exactly
what was written as to layout of meals, and portions per meal. but we need
help getting a schedule, is there one available?

It is very difficult to give you a schedule for what to eat and when to eat it because I don't know anything about your eating habits. However, I can provide you with some guidelines that may influence your meal planning. First of all, you should follow Canada's Food Guide to Healthy Eating.

I am a weightlifter and I train 4 times a week for about an hour. Besides that I spend about 2 hours in the gym doing cardio 5 times a week. What kinds of foods should I be eating to maximise my performance in weightlifting and keep my energy up throughout the day?
Click here for the Inside Track on the refueling system.

I have a Moderate case of hypoglycemia. So what foods will work into my life style and not effect my medical problems?
Here is a link for you to get more information on hypoglcemia: http://www.niddk.nih.gov/health/diabetes/pubs/hypo/hypo.htm#other
Congratulations on your physically active lifestyle - these daily physical activities combined with a healthy diet will help you to achieve a fit and healthy body and soul! Making sure that you are well fueled for your active lifesyle is important, even if you want to lose some excess body fat. Make sure that you have had a small pre-workout snack - such as 1/2 piece of fruit or 1/2 cup of juice. Always bring a water bottle along for the ride/workout. Post workout nutrition is really important for women to pay attention to - you need to start your body's refueling by eating/drinking a small amount of a carbohydrate/protein combination. Small amounts, 100-200 kcal are likely all that is needed to get a head start on your nutrition and to make sure that your blood sugar does not drop toolow and cause you to feel symptoms of hypoglycemia after exercise. Examples include: low fat milk or yogurt, veggies with hummus dip, crackers, cheese and juice. Smaller appetites need smaller amounts and vice versa.

I've read that I should avoid tea, coffee and milk while eating iron-rich foods as they block absorption of iron - is this true for herbal teas, such as green tea? I drink quite a bit of green tea and I want to know if I should not have as much of this as well as regular tea.
Dietary iron absorption is most affected by calcium phosphate, bran, phytic acid (present in umprocessed grain products and polyphenols (found in all types of tea and some vegetables). Even herbal teas such as green tea are a source of polyphenols.

How does iron defiency, anorexia and bone density in women their affect physical performance?
Iron deficiency means that a woman does not have sufficient oxygen carrying capacity in her blood - so that she feels tired and has reduced endurance performance. Anorexia means that a woman will have very few reserves of body fat or muscle glycogen which will also affect her ability to train and achieve peak performance. Low bone density puts that woman at a risk of stress fractures and fractures which will limit her ability to be involved in physical activities. So each of these three situations will affect not only a woman's physical performance but ultimately, her health will suffer.

I am a runner but i dont know what foods i should eat and stay away from before and after a race or just a jog?
What you should eat depends upon the foods that you like to eat and that work well for you. The intensity and duration of your run will also influence what you can eat and how much you can tolerate. Gearing up for a high intensity training session means a small snack in the hour before NOT a meal. Post workout, focus on small frequent feedings of predominantly carbohydrate rich foods (e.g. milk, yogurt, fruit, nut butter sandwich) until your next meal.

My daughter is on a totally dairy free diet and we give her OJ fortified with calcium hydroxide. I think that calcium hydroxide contains no dairy at all, but is from mineral souces. Is that correct?
Calcium Hydroxide is basically limestone - which is calcium carbonate - so it is dairy free! However there are milk ingredients added to many foods so check your ingredient lists to make sure.

What foods are high in vitamen B 12?
Animal products and fermented foods are sources of Vitamin B 12.

I have recently been put on a restrictive diet because they found out I am allergic to corn, wheat, and peanuts. Do you think pure butter and the cheese is alright?
Any food product that has MSG in it has to have it marked on the ingredient list on the label. For people with gluten intolerance the presence of MSG indicates the presence of gliadin (a breakdown product of the protein component of some grains, including wheat) so you would want to avoid consuming these food products. So read your food labels of your cheeses, etc and if you are unsure about a certain food product - call the manufacturer of the product.

My daughter is on a totally dairy free diet and we give her OJ fortified with calcium hydroxide. I think that calcium hydroxide contains no dairy at all, but is from mineral souces. Is that correct?
Calcium Hydroxide is basically limestone - which is calcium carbonate - so it is dairy free! However there are milk ingredients added to many foods so check your ingredient lists to make sure.

I have a question about pickled vegetables. Do they have much nutritional value?
Pickled vegetables have lots of nutritional value - however they are much hogher in sodium (salt) than fresh or frozen vegetables.

I have been diagnosis with rheumatoid arthritis of the joints; should I be changing by diet?
You would only need to change your diet if you do not already include foods that may help with the arthritis - these would be:

1. More fish, less meat: in a Danish study, people with rheumatoid arthritis who were put on a diet that included an average of 4 ounces of fish a day experienced a significant decrease in morning stiffness, swollen joints, and pain after 6 months' time.

2. sources of omega 3 fatty acids such as fatty fish (salmon, herring, mackerel, swordfish, lake trout), and a number of plant foods that also contain a less powerful form of omega 3 fats - milled flax seed or flax oil, canola, hempseed and soya oils.

3. More fuit and veggies - at least 3 veggies and 3 fruits - to give 200 mg of Vitamin C each day

4. Lose excess body fat - excess body weight is a lot of wear and tear on your joints.

I work out regularly and eat the rightt foods, however I enjoy drinking diet pepsi. Will drinking diet pepsi keep me from reaching my goal of being cut up and toned?
Diet pepsi has no calories so from an energy balance point of view it has no effect on body composition unless it is being used to replace other sources of calories in your diet. Diet soda is not a great way to nourish your body. We would suggest plain old water instead.

I am a high school FEMALE basketball player. I am looking for all the things the product (vertical blast) offers. All of the reports about it are from men, and I was just wondering if a girl taking it would be OK? Also, are there any side effects, I don't want to wake up with a hairy chest or anything like that .
If you are looking for a way to improve your jumping ability I would say that you would be much better off (and successful) by getting yourself into a power weight training program that would improve your vertical jump. You should also talk to your coach about getting into some speed, agility and quickness training for BBall.

I am a competitive swimmer over the summer. What foods should eat that will give me a lot of energy?
Your best energy foods are those that are rich in carbohydrate. Breads and cereals, fruits and vegetables, low fat milk and yogurts, and legumes (chick peas, lentils, kidney beans, etc.) are your best choices. Use the food guide to plan carbohydrate rich choices at every meal and snack!

What's bioavailability? What's fight stress drink? (example & why).
1. What's bioavailability?
Bioavailability refers to how much of the nutrient or drug that you are taking is available for use by your body. Different components of foods enhance the bioavailability of some nutrients while others components reduce the bioavailability. Calcium's bioavailability is enhanced by consuming it with vitamin D and/or Vitamin C. Iron's bioavailability is enhanced with vitamin C.

2. What's fight stress drink?(example&why)
I am not sure what you mean by this question - if you are asking about how to best fight stress, then I would encourage you to use physical activity as a means to reduce stress - it has been proven to work!

Is eating some fats healthy?
Fat is an essential part of your diet! Some fat in our diet is necessary for good health. Eating too much fat is not healthy, but eating too little is not good either. Fat supplies our bodies with lots of energy and certain fats that are essential for life. These are called essential fatty acids. Fat also carries some vitamins into our bodies, specifically vitamins A,D,E,K. Fat also makes food taste GREAT! Many Canadians (young and old) eat too much fat. This can lead to weight gain and an increase in the risk heart disease and certain types of cancer. So choose to eat less fat and fatty foods. Use Canada's Food Guide to Healthy Eating to guide you along the road to a heart healthy diet. It is not necessary to cut out higher fat foods completely, just make the lower fat food choices in each food group your regular choices.

Is coffee good for you when you're training?
Many athletes include coffee as a regular part of their diet. Regular coffee contains caffeine which is a stimulant as well as a diuretic. So a shot of coffee can perk us up as well as make us pee a little more than normal. So make sure to include a little more non caffeine containing fluid (water) in your diet to stay hydrated.

 


Please note that this information is intended to provide general information on common nutrition/physical activity/medical topics. It is not a comprehensive medical review and does not include all the potential medical conditions, issues, or considerations. Therefore it cannot and should not be relied upon as a substitute for seeing an appropriate health care professional (who can provide individualized and comprehensive assessment and advice).

 

 

 

 

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