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Foods to add to your plate for the winter

Posted on February 5, 2024

During the winter, we often face a dip in temperatures, wind chill and a lack of sunshine. To stay healthy and happy, try adding these nutrients and foods to your plate.

Click here to watch my national TV interview on this topic.

Vitamin D

Vitamin D benefits our bone health, immune function and mood. Research shows that low vitamin D status is associated with depression. Often called the “sunshine vitamin”, vitamin D can be made when our skin is exposed to ultraviolet B rays from sunlight. However, during our Canadian winters with shorter days, there isn’t enough sunlight for this to happen. And even if we are outdoors, we’re usually all bundled up to stay warm. In fact, the risk of vitamin D inadequacy can double during the winter, compared to the summer.

From October to March, it’s advisable to take a vitamin D supplement, especially if you’re over the age of 50. Health Canada suggests 400 IU of vitamin D per day while other organizations such as Osteoporosis Canada recommend a higher supplement dose if you’re at high risk for osteoporosis.

What you can do: In addition to taking a vitamin D supplement in the winter, add these vitamin D-containing foods to your plate: fatty fish (e.g. salmon, artic char, canned sardines), eggs, mushrooms, milk and fortified plant-based beverage.

Whole grains

During the dark, cold wintry days, it’s easy to feel a little blah. You probably already know that eating whole grains can lower your chances of developing heart disease. But did you know that whole grains can boost your mood too?

Carbohydrate foods – like whole grains as well as legumes, fruits and vegetables – triggers our body’s production of serotonin which is a hormone that helps us feel calm, relaxed and happy. The key is to enjoy carbohydrates WITH protein. In protein foods, there’s a specific amino acid called tryptophan which is needed to make serotonin.

What you can do: Pair whole grains with protein to make delicious meals. Try a sandwich made with whole grain bread and grilled chicken or egg. How about a bowl of oatmeal with nuts and seeds? For pasta salad lovers, stir in a can of beans. My favourite pairing is quinoa with salmon – not only does salmon provide vitamin D, but it also is a fantastic source of heart healthy and mood-boosting omega-3 fats.

(Learn more about tryptophan in my blog: Does eating turkey make you sleepy?)

Vitamin C

Vitamin C is just one of the many nutrients needed for a strong immune system, especially during cold and flu season. Research shows that getting enough vitamin C can reduce the duration of a cold by 8%. A single orange offers your daily quota for vitamin C, and so does 1 cup of fresh/frozen strawberries, 1 cup of broccoli, 1/2 red pepper or 1-2 kiwis. Vitamin C also plays a role in producing collagen to support skin health.

What you can do: Think beyond oranges for vitamin C. For variety, also try grapefruit, tomatoes, cauliflower, Brussels sprouts and potatoes.

Dark Leafy Greens

Canada’s Dietary Guidelines actually recommend eating one dark green vegetable every day. Fibre, folate and magnesium are a few of the notable nutrients found in leafy greens. Magnesium is actually important for stress management. When we’re stressed, levels of cortisol (the stress hormone) rise. Magnesium works to reduce cortisol levels. Some magnesium superstars are spinach, kale, bok choy, romaine lettuce and Brussels sprouts.

What you can do: Add leafy greens to soups, smoothies, stews, salads and casseroles. Magnesium is also found in other foods like nuts, seeds, whole grains and DARK CHOCOLATE! A 40 gram portion (1.5 ounces or 3 squares) of dark chocolate contains about 25% of your daily requirement for magnesium. Enjoy!

Written by Sue Mah, MHSc, RD, PHEc, FDC, award-winning dietitian, Nutrition Solutions Inc.

Does eating turkey make you sleepy?

Posted on October 3, 2023

Feeling sleepy after your Thanksgiving meal? Don’t blame it all on the turkey. The many components of the meal – including carbohydrates – may work together to trigger that lull to nap land.

Here’s a simple science lesson.

Turkey, as well as foods like chicken, cheese and milk contains an amino acid called tryptophan.

Tryptophan is a component of serotonin which is a neurotransmitter that helps us feel calm and relaxed. Serotonin is then also used to make the sleep-inducing hormone called melatonin.

As we digest foods containing protein, the amino acids enter the bloodstream and make their way over to the brain. The problem is that tryptophan is a big, bulky amino acid. So it has to compete with other amino acids to get into the brain. Imagine this as a long lineup of people waiting to get into a concert.

Enter carbs. The carbs you eat from the delicious stuffing, mashed potatoes, pumpkin pie and other typical Thanksgiving fare triggers the release of insulin. This action removes most of the amino acids from our bloodstream, but not the tryptophan. It’s as if all of the people in line for that concert have been pushed away, except for tryptophan. This of course makes it easier for tryptophan to enter the brain and start its effect on serotonin and melatonin to create that calm, sleepy feeling.

Another possible explanation for the sleepiness is that there’s more blood flow to your stomach to digest the meal, meaning less blood flow to your brain. And let’s not forget that a glass or two of alcohol may play a role.

So what should you do if you’d like to avoid the ZZZ’s after your Thanksgiving meal? Well, you could try to enjoy smaller portions of carbohydrate-containing foods. Maybe have a coffee with dessert. But if you’re like me, you’ll simply enjoy the wonderful, hearty meal with family and cozy up with a pillow afterwards!

Does eating turkey make you sleepy?

Posted on October 9, 2015

Feeling sleepy after your Thanksgiving meal? Don’t blame it all on the turkey.

Like all protein-containing foods, turkey is made up of amino acids. The amino acid of particular interest in turkey is called tryptophan. Tryptophan is a component of serotonin which is a neurotransmitter that helps us feel calm and relaxed. Serotonin is also used to make the sleep-inducing hormone called melatonin.

Enter carbs. The carbs you eat from the stuffing, mashed potatoes, pumpkin pie and other typical Thanksgiving fare stuffing actually triggers the release of insulin. This action removes most of the amino acids from our bloodstream, but not the tryptophan. It’s as if all of the people in line for that concert have been pulled away, except for tryptophan. This of course makes it easier for tryptophan to enter the brain and start it’s effect on serotonin and melatonin to create that sleepy effect.

So if you’d like to avoid the ZZZ’s after your Thanksgiving meal, try to ease up on the servings of carbs on your dinner plate. It doesn’t hurt to go easy on the alcohol too. Otherwise, grab a pillow for a Thanksgiving ticket to nap land!