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Thinking Of Going Gluten-free? Read This First

Sally Shi-po POON (Registered Dietitian)

Gluten-free diet has gained considerable popularity in the general population over the past decade. Many celebrities and athletes have acclaimed it as an effective way to better health, weight control and athletic performance. There is, however, a lack of scientific evidence to support these claims. On the contrary, there are studies suggesting that gluten avoidance in diet may not be as “healthy” as it claims.

What is gluten-free diet?

Gluten-free diet is a diet that doesn’t contain any gluten. Gluten is a protein that is found in wheat, barley, rye, malt, and oats (unless they are labelled gluten-free). These ingredients are commonly found in bread products, pasta, breakfast cereals, cakes, cookies, batter-fried foods, beer and ale. There are a number of gluten-free grains and plant foods that are suitable for those on gluten-free diet. They include amaranth, arrowroot, buckwheat, cassava, corn, flax, legumes, millet, nuts, oats labelled gluten-free, potato, quinoa, rice, sago, seeds, sorghum, soy, tapioca, and teff.

Who should follow gluten-free diet?

People who have coeliac disease should follow gluten-free diet strictly. Coeliac disease is a serious, genetic, autoimmune illness where the consumption of gluten induces damage to the small intestine and causes nutrient malabsorption. Symptoms include bloating, diarrhoea, nausea, gas, constipation, fatigue, mouth ulcers, unexpected weight loss, hair loss and anaemia. The only treatment for celiac disease is strict avoidance of gluten for life. If you think you have coeliac disease, do not remove gluten from your diet until your doctor makes a diagnosis. If you remove gluten from your diet too early, it will cause an inaccurate result for both blood test and gut biopsy.

Non-coeliac gluten sensitivity

Some people have gut symptoms when eating gluten, even if they don’t have coeliac disease. This is called non-coeliac gluten sensitivity. Symptoms are similar to coeliac disease, such as abdominal pain, bloating, and diarrhoea. Most people with non-coeliac gluten sensitivity agree that there is an improvement of symptoms after following gluten-free diet. The exact trigger for the non-coeliac gluten sensitivity remains controversial thus far. There are reports suggesting that fermentable oligo-di-mono-saccharides and polyols (FODMAP) in wheat, rather than gluten, induce the gut symptoms. The exact cause is, however, yet to be identified.

Is gluten-free diet healthy for the general population?

Not really! Although some celebrities adopt gluten-free diet for weight loss, there is no data to support similar effectiveness among people without coeliac disease. It is important to note that gluten-free does not necessarily mean low-energy. In 2017, experts from the European Society for Paediatric Gastroenterology Hepatology and Nutrition warned that gluten-free products should not be considered a healthy substitute to regular foods because they usually contain higher levels of saturated fat and lower levels of protein.

In 2017, a study published in British Medical Journal found that gluten-free diet may increase cardiovascular risk as a result of reduced consumption of hearty wholegrains. Gluten-free cakes, cookies, muffins, crackers, bread and pizza are usually made with refined carbohydrates, which are high in glycaemic index, and low in B vitamins, iron, and dietary fibre.

In addition, people on gluten-free diet were found to have significantly higher levels of heavy metals such as arsenic, mercury, lead, and cadmium than those not avoiding gluten. More research is needed to determine whether this diet poses a significant health risk in the long run. In case if gluten-free diet is needed, the best way to avoid excessive exposure to these metals is to diversify the food menu.

Does gluten-free diet improve athletic performance?

Implementation of gluten-free diet among non-coeliac athletes has become increasingly popular because of perceived ergogenic and health benefits. In 2015, a carefully designed study published in Medicine & Science in Sports & Exercise concluded that a short-term gluten-free diet had no overall effect on exercise performance, gut symptoms, perceived well-being, intestinal injury, and inflammatory responses in non-coeliac athletes. Whether avoiding gluten for a longer period of time would lead to improvements in sports performance or well-being is yet to be identified. Nevertheless, current study suggests that gluten-free diet is not a panacea. Athletes should always remember that proper nutrient intake and timing are critical components of athletic success.

Before adopting gluten-free diet…

The significance of gluten-free diet in the general population remains controversial and more research is warranted. Before adopting gluten-free diet, you should consult a dietitian to ensure that you will get all the essential nutrients from a variety of foods, including gluten-free grains, fruits, vegetables, legumes, fish, lean meat, nuts, seeds, and dairy.

If you are suffering from any gut symptoms, such as abdominal pain, bloating, or diarrhoea, you should consult a doctor for medical advice. Self-treatment or delay in treatment is undesirable.

Sally’s Nutrition Blog @ Hong Kong Tatler: https://hk.asiatatler.com/life/everything-you-need-to-know-about-going-gluten-free

5 Dietitian-approved Foods To Fight Inflammation

By Sally Shi-po POON (Registered Dietitian)

Inflammation can be a long-term physiologic response to environmental toxins, infection, poor nutrition, stress, and aging. Chronic inflammation causes damage to body cells and eventually lead to diseases such as cancers, heart disease, diabetes, arthritis, depression, and Alzheimer’s disease. Studies have found that some nutrients from natural foods are safe and effective to help combat inflammation in the body. Here are 5 anti-inflammatory foods that I suggest:

1. Salmon
Salmon is an excellent source of omega-3 fatty acids that have been shown to have anti-inflammatory properties. A study found women who ate more omega-3 had lower levels of inflammatory markers in the blood reflecting lower levels of inflammation, which might explain in part the effects of these fatty acids in preventing cardiovascular disease. The American Heart Association recommends eating fish (particularly fatty fish) at least two servings a week, each serving is 3.5 ounces cooked. Other fatty fish like albacore tuna, herring, lake trout, mackerel, and sardines are also high in omega-3 fatty acids.

2. Beans
Beans are rich in dietary fibre, antioxidants, and anti-inflammatory compounds, which help lower the levels of C-reactive protein (CRP), one of the key markers of inflammation in the blood. Studies have found that a high fibre diet helps to reduce CRP levels. Fruits, vegetables, and whole grains also contain plenty of dietary fibre and antioxidants, which can fight inflammation.

3. Walnuts
Walnuts are packed with omega-3 fatty acids, dietary fibre, and phytonutrients that can protect against inflammation and promote healthy aging. Although nuts and seeds have anti-inflammatory benefits, they are high in calories so be mindful of portion sizes. Whilst the number of nuts per serving varies by type, a typical serving is 1 ounce (about 1/4 cup) or a small handful. One ounce of English Walnuts equals 14 halves.

4. Extra virgin olive oil
Extra virgin olive oil is the fresh juice that is squeezed directly from the olive fruit, it is credited as being one of the healthful components of the Mediterranean diet. Extra virgin olive oil is not refined or extracted using chemicals or heat, leaving it high in natural antioxidants, such as oleocanthal, which have significant anti-inflammatory properties. Although olive oil has lots of health benefits and tastes good in salad or pasta, it is energy dense so eating too much can cause weight gain. The healthy eating guideline recommends using 4 to 6 teaspoons of oil in your cooking or salad dressing a day.

5. Turmeric
Turmeric is very popular in grocery stores lately due to its promising anti-inflammatory benefit. Curcumin is the key active compound in turmeric but its absorption is poor. Consuming curcumin with some black pepper and healthy oils can enhance its absorption. It goes well with grains, beans, vegetables and white meats; and can enhance the flavour of soups and stews.

Extra tips on anti-inflammatory eating:
Foods that contribute to inflammation are the same ones generally considered bad for our health, including deep-fried foods, sugar-sweetened drinks, refined carbohydrates (such as white bread and pastries), red meat and processed meats. In general, an anti-inflammatory diet means your plate is dominated by a variety of colourful fruits, vegetables, whole grains, fish, nuts and healthy oils.

Sally’s Nutrition Blog @ Hong Kong Tatler: https://hk.asiatatler.com/life/5-dietitian-approved-foods-to-fight-inflammation

Why A Colourful Diet Is Good For You

By Sally Shi-po POON (Registered Dietitian)

We’re always hearing that we should “eat the rainbow”, but what does that mean and why is a colourful diet so highly recommended by dietitians all over the world? Not only are they appealing, the phytochemicals that give foods their colour are packed with nutritional benefits. I have grouped the foods into 5 categories according to their predominant phytochemical group: red, orange, green, purple, and white.

 

1. Red

Lycopene is the predominant pigment in red fruits and vegetables such as tomatoes, watermelon and pink grapefruits. It is a powerful antioxidant that may help prevent prostate cancer and heart diseases. Lycopene is better absorbed when it is cooked with some oil, such as tomato sauce with olive oil.

 

Astaxanthin, which is found in the red pigment of crab, salmon and prawns, has been found to have antioxidant and anti-inflammatory effects. Its antioxidant activity was found to be 10 times more than zeaxanthin, lutein and beta-carotene.

 

2. Orange

Beta-carotene is a pigment found in yellow and orange fruits and vegetables, such as carrot, cantaloupe melon, mangoes, orange peppers, pumpkin, and sweet potatoes. In the body, beta-carotene converts into vitamin A, which is needed for good vision, a strong immune system, and healthy skin. Food processing and cooking help release beta-carotene from the food matrix and make it easier to absorb. Moreover, its absorption requires the presence of fat in a meal, such as canola oil, almonds, flaxseed or pumpkin seeds.

 

3. Green

Green cruciferous vegetables such as broccoli, cabbage, brussel sprouts, and kale are good sources of sulforaphane and glucosinolate, which have antioxidant and anti-inflammatory properties.  These vegetables also contain lutein and zeaxanthin, which may help protect eyes from sunlight damage and reduce the risk of cataracts and age-related macular degeneration. Lutein and zeaxanthin are better absorbed with fats, so be sure to eat the vegetables with some avocado, cheese, walnuts, sunflower seeds or olive oil. Green vegetables are also excellent sources of vitamin K and folic acid. Folic acid helps prevent neural tube defects during pregnancy, and vitamin K plays a major role in blood clotting.

 

4. Purple

Anthocyanins are pigments that appear purple or blue, which are found in eggplant (especially the skin), blueberries, blackberries, prunes, plums, black rice, purple sweet potato, and purple cauliflower. The darker the colour, the higher the anthocyanins concentration. Boiling vegetables can increase the loss of water-soluble nutrients such as anthocyanins and vitamin C, therefore baking and steaming are preferred as they can retain more of the nutrients, as well as the flavour and colour.

 

5. White

Anthoxanthins are the white or colourless pigments found in bananas, cauliflower, garlic, shallots, mushrooms, onions, parsnips, and turnips, which may help reduce the risk of heart disease.  Garlic contains allicin, which has antioxidant, anti-inflammatory, antimicrobial, and heart-protective properties. Allicin is produced when fresh garlic is finely chopped or crushed. Garlic provides an alternative to salt in cooking, along with other herbs and spices. Eating less salt is important for preventing high blood pressure, heart attacks and stroke.

 

Including a variety of colourful foods in your diet seems to equal better overall health.  Start planning some colourful recipes tonight and have a healthy start in 2018!

 

Sally’s Nutrition Blog @ Hong Kong Tatler:  https://hk.asiatatler.com/life/why-a-colourful-diet-is-good-for-you#page-1

5 Dietitian-approved Festival Foods For The Holiday Season

By Sally Shi-po POON (Registered Dietitian)

Eating healthily during the holiday season must be one of the most difficult challenges for many people as we’re often surrounded by lots of delicious food and drink. Although there is no reason to feel guilty about enjoying yourself on those special days of the year, it’s worth remembering that people gain about 0.4 to 0.9 kg during the festive period due to over-eating. But don’t despair — this year can be different! Here are my recommended festival foods and healthy eating tips to help you get in shape this season:

1. Turkey
Turkey is the culinary star of Thanksgiving and Christmas. It is a good source of lean protein, iron, zinc, and B vitamins. Enjoy turkey baked or roasted – place turkey on a rack while cooking so fat will drain off and use a paper towel to soak up fat. Best to remove the skin before you cook as most of the fat is found in the skin and the vegetables tend to absorb the fat easily. When making gravy, try to use vegetable broth or remove the fat if using meat juices.

2. Cranberries
Cranberries are an excellent source of proanthocyanidins which helps maintain a healthy urinary tract. Cranberries are harvested and sold fresh in the fall, but they’re processed and sold year-round frozen, dried, canned, or as juice. Try turkey with cranberry stuffing or cranberry sauce. Alternatively, add cranberries to Christmas pudding or mince pies; or use unsweetened cranberry juice for making mulled wine or mocktails.

3. Brussels sprouts
Brussels sprouts are a rich source of vitamin C, vitamin A, vitamin K, folate, and fibre. They are classified as cruciferous vegetables, which may help protect against cancer and cardiovascular disease. Brussels sprouts can be roasted, sautéed or steamed. Boiling Brussels sprouts will lead to significant loss of vitamin C so is less preferred. Use olive or canola oil instead of butter or grease from meats, try using oil spray or brush to control the amount of oil added, and roast on a non-stick tray or foil.

4. Pumpkin
Pumpkin is the most popular food for Halloween and pumpkin pie is an American tradition for Thanksgiving. This colorful starchy vegetable is rich in carbohydrates, vitamin A, potassium, and fiber. To make a healthy version of pumpkin pie, choose low-fat milk or soymilk, and real pumpkin or unflavored canned pumpkin. Avoid serving with whipped cream or ice cream on top. The seeds of pumpkin are a good source of protein, polyunsaturated and monounsaturated fatty acids. Enjoy a small handful of roasted pumpkin seeds as a healthy snack over chocolates and crisps.

5. Pies (no, really)
Christmas pudding and mince pies are packed with fruits so they are rich in fibre and antioxidants. Serve Christmas pudding with low-fat custard or crème fraiche, and try lighter version of mince pies made with filo pastry. Don’t forget to control the portion too – always share the dessert with your friend to cut the calories.

 

Bonus tips to control your weight during the holiday season:

Get moving
Being active can help you burn off the extra treats you couldn’t resist. Why not dance the night away at the parties and go for a brisk walk after a meal.

Drink in moderation
Don’t forget drinks have calories too! Try alternate your alcoholic drinks with non-alcoholic beverages such as sparkling water, diet sodas or diluted unsweetened juice. Offer to drive so you can stay away from alcohol and always put a jar of water on the table at mealtimes.

Ultimately, the most important thing is to enjoy the holiday and have a wonderful time with your loved ones. Remember weight maintenance is a success, and following my tips above will help you have a good time without overindulging.

 

Sally’s Nutrition Blog @ Hong Kong Tatler: https://hk.asiatatler.com/life/5-dietitian-approved-festival-foods-for-the-holiday-season#page-5

5 Dietitian-approved Nutrition Tips To Get Fit For Summer!

By Sally Shi-Po Poon (Dietitian)

 

With summer coming up, everybody would love to have a slim body shape ready to hit the beach! Here are some practical tips to help you get fit and healthy:

 

  1. Very often people go straight on a low-carbohydrate diet when they want to lose weight. However many of them experience weight rebound once they have gone off the diet. Comparing the a low carbohydrate (Zone), a very low-fat diet (Ornish) , and a very low carbohydrate (Atkins) diets to each other and to a typical calorie-restricted (Weight Watchers) diet, research found them all to have a similar impact on weight. The Ornish diet and the Atkins diet had the poorest compliance rates. The study concluded that compliance and caloric deficits are keys to successful weight loss.

 

  1. There are 9 calories in every gram of fat, regardless of what type of fat it is. Consuming high levels of calories – regardless of the source – can lead to weight gain. Consuming high levels of saturated or trans fats (e.g. full fat dairy, animal products, butter and pastries) can lead to heart disease and stroke. For good health, the majority of the fats that you eat should be monounsaturated or polyunsaturated (e.g. fish, olive oil, avocado, nuts and seeds). However, you still need to control your portions; for example, 100g avocado (half piece) provides 160 kcal and 15g fat; and 1 oz. of almonds (23 kernels) provides 164 kcal and 14g fat!

 

  1. Go low GI (Glycaemic Index)! Wholegrains such as brown rice, quinoa, barley, rye, whole wheat pasta, buckwheat noodles, wholegrain bread, and oatmeal, carry lower GI values that make you feel fuller for longer. So you experience fewer cravings for junk foods!

 

  1. If you drink alcohol, moderate your consumption to no more than 2 alcohol units a day as alcohol is high in calories and harmful to health. Alcohol contains 7 calories per gram, almost the same calories as fat. For example, 175ml glass of wine (13%) provides 159 calories and that’s equivalent to 2.3 alcohol units. So it’s definitely not only the beer that makes your belly grow!

 

  1. Is it hunger or craving? Be aware of how your emotions affect what you want to eat. For example, do you eat more when you’re feeling angry, upset, lonely or bored? Use distractions to help control craving. For example, go for a walk, phone a friend, take a bath or apply a face mask.

 

Remember there is no quick fix and making changes to your lifestyle can require a lot of effort. When you achieve the target, reward your success with a gift that is non-food-related… maybe new clothing for this summer?

 

Sally’s Nutrition Blog @ Hong Kong Tatler: http://hk.asiatatler.com/wellness/get-fit-for-summer-5-dietitian-approved-nutrition-tips