Weight loss - common myths

(Calories (cal) is another measure of energy and is still used in some other countries, such as the USA). The macronutrients each supply a different amount of energy per gram: alcohol = 29kJ. Fat and alcohol supply much more energy per gram than both protein and carbohydrates – a 35g slice of bread has about 360kJ while 35g of butter has 1062kJ of energy (almost 3 times as much as the slice of bread!).

Our energy needs vary depending on factors such as:

and consume enough nutrient dense foods. It is also critical to limit the amount of energy dense
nutrient poor foods to be a healthy weight. If you eat more energy (kilojoules) than you use
you will put on weight whether those kilojoules come from fats
carbohydrates or proteins

– let’s debunk some of them.

Carbohydrates are essential for a well-balanced diet and healthy body

They are the body’s preferred energy source and fuel vital organs – including the brain, central nervous system and kidneys.

Eating a potato, a bowl of pasta, or any type of carbohydrate-rich food won’t automatically make you fatter. In fact, the American Dietary Guidelines recommend 45 to 65% of energy needs to come from carbohydrates.

Some carbohydrates are healthier than others

Have a slower and flatter blood glucose response.

They take longer to digest and can help us feel full

Lower GI foods are less refined (or processed) such as , fruits and grains, you may not be getting enough vital nutrients to manage your weight effectively.

These types of diets can increase your risk of micronutrient deficiencies and content.

If you’re watching your weight, be mindful of the portion size of foods that you enjoy. A big serving of potatoes or pasta, served with high saturated fat butter, sour cream or creamy sauces will not help you lose weight.

, you need to be regularly eating more energy than your body needs. High-carbohydrate foods have about half the amount of energy of high-fat foods.

When choosing high-carbohydrate foods such as grains and cereals, it’s best to choose wholegrain options.

They will fill you up with fibre and provide additional health benefits. There are many types of low carbohydrate diets – Paleo, Atkins, South Beach and Keto are just some. All of these diets restrict the amount of carbohydrate consumed to force the body to use protein and fat for fuel.

In the short term, very low carbohydrate diets can result in greater weight loss than high carbohydrate diets. But in the long term, weight loss differences appear to be minimal. Very low carbohydrate diets can be unhealthy as carbohydrates are the preferred fuel source for our bodies to work effectively (especially the brain).

If we restrict carbohydrates our and we may experience more mood swings than usual.

In addition, these diets increase our risk of kidney problems from having to process abundant protein (far more than the 15 to 25% of energy recommended to reduce disease risk). And by cutting out large groups of vegetables, fruits and grains, these diets also tend to increase your risk of micronutrient deficiencies and constipation because of their low fibre content.

because they restrict kilojoules or energy

The body begins to use stores of glucose and glycogen (from the liver and muscles) to replace the carbohydrates it is not getting from food. Around 3g of water is needed to release 1g of glycogen. Any weight loss at the beginning of a low-carbohydrate diet is mostly water, not body fat.

As carbohydrate stores are used up, the body begins to rely on other sources of fuel such as fat. This can lead to the development of ketones in the body, which can make the body acidic. It can also contribute to metabolic changes, which may be dangerous for some with certain conditions (such as diabetes).

Symptoms that may be experienced from a low-carbohydrate diet, include: loss of appetite. The long-term health effects of a diet very low in carbohydrates but high in saturated fat is still uncertain. Further research is needed to determine the safety of these diets.

Possible long-term effects may include:

when a normal diet is resumed some muscle tissue is rebuilt water is restored
weight quickly returns. – restricted intake of antioxidants
fibre from fruits
vegetables can increase a person’s risk of constipation. – such as the ‘yoyo’ effect (where people lose
regain weight many times over a long period
rather than sustaining weight loss)

– diets high in protein and fats are associated with conditions, (such as heart disease, diabetes and ). This can occur if you have a diet high in fat, especially from fatty and processed meats (such as salami, sausages and bacon). – can occur in people with impaired kidney function or diabetes.

– due to loss of calcium from the bones. While many low carbohydrate diets focus on obtaining energy from protein, the Keto diet focuses on fat for fuel – contributing up to 90% of energy from fats (instead of the recommended 20 to 35% to reduce disease risk). This means the liver must process extra fat so it could worsen an existing liver problem.

Also, the high amounts of saturated fat typically consumed in Keto diets increases the risk of elevated ‘bad’ LDL cholesterol and heart disease. Because the long-term safety of these diets is unknown, seek advice from your doctor or a dietitian as there is likely a safer and more sustainable way for you to lose weight.

Plenty of diets are based on the belief that the digestive system can’t process a combination of foods or nutrients.

Commonly, carbohydrates (such as grain foods) and proteins (such as meat foods) are incorrectly thought to ‘clash’, leading to digestive problems and weight gain.

The opposite is often true – foods eaten together can help the digestive system

Such as, vitamin C in orange juice can increase absorption from a meal rich in plant-based iron like beans and rice, lentils and other legumes.

Also, very few foods are purely carbohydrate or purely protein – most are a mixture of both. The digestive system has enzymes that are perfectly capable of breaking down all the foods we eat so single food diets should be avoided. Some people believe some foods can help us lose weight – for instance, grapefruit, celery or kelp can burn fat or speed up.

But this is not true

Fibre from food comes closest to having special dietary qualities, because it provides a feeling of ‘fullness’ with minimal kilojoules. High-fibre foods (such as fruit, vegetables, wholegrain breads and cereals and legumes) are usually high in nutrients and low in unhealthy fats. The term ‘superfood’ gets used a lot but there is no standard definition of what a superfood must be.

Most foods labelled as superfoods tend to be plant-based – acai berries, wheatgrass, spirulina, salmon, leafy greens, tea and turmeric. Although typically packed with nutrients – vitamins, minerals and antioxidants – they have little energy.

If you enjoy these foods and can afford them, there’s nothing wrong with having them as part of a healthy diet.

But don’t expect to get huge health benefits by eating a couple of these with a poor diet. It is your overall dietary pattern that has the biggest impact on your health. It sounds simple enough – don’t eat and the weight will come off – but skipping meals can fail.

Not only will starving yourself result in feeling tired and lethargic, your body is more likely to miss out on essential nutrients. Then when you do eat, you’re more likely to overeat and to make poor food choices.

Over the long term, skipping meals is unlikely to help with weight loss at all

The important thing to losing weight and keeping it off is to make small, achievable changes to your eating and exercise habits: Choose from a wide range of foods every day. Eat less-processed foods.

Have a regular pattern of eating

Increase the amount you move each day to burn extra energy. Intermittent fasting has been followed by various religions for centuries. Fasting has gained popularity with the 5:2 diet, where for 5 days, people eat their usual diet and on the remaining 2 days, a very low energy diet is followed.

There are various versions of intermittent fasting, with some preferring to restrict energy on alternate days, alternate weeks or certain times of the day. (For example, following a 16:8 plan – fasting for 16 hours of the day and eating for the other 8 hours. Although this is considered ‘time restricted feeding’, it is still a version of intermittent fasting.) Fasting overnight until your first meal the next day could also be called a form of intermittent fasting (break-fast).

Evidence shows there is generally no difference in the amount of weight lost by following a fasting diet when compared with a traditional energy restriction diet. sustain it is key to losing and keeping off weight.

If following a strict intermittent fasting schedule doesn’t sound like something you could do for a long time, then this may not be the best way to keep your weight in check.

Eliminating whole food groups from your diet won’t necessarily help you lose weight. for cultural, ethical or other reasons, eliminating animal products from your diet won’t help you lose weight. This is because you would need to reduce the overall number of kilojoules (energy) you’re having – just the same as a diet that has animal products.

Some research shows a healthy vegetarian dietary pattern, or a mainly plant-based diet, is associated with lower levels of obesity and reduced risk of health problems (such as and heart disease). But there are still many vegetarian food choices that can lead to weight gain, especially those that are high in fats and added sugars or if eaten in large amounts.

If you haven’t been diagnosed by a health professional as having one of these conditions, then there’s no need to follow a gluten-free diet.

By doing so, you may miss out on many of the vitamins, minerals and fibre from grains. And, if you’re choosing overly processed foods just because they’re labelled ‘gluten-free’, you may find you gain weight, especially if they’re lacking in fibre to fill you up. It also does not contain any kilojoules (energy) like many other drinks.

Most other drinks have extra energy (usually from added sugars) without the health benefits of other nutrients. These include:

coffee made with full cream milk
flavoured syrup

And if energy from drinks is not used by our body it will be stored as fat. There’s nothing wrong with enjoying these drinks occasionally as part of a balanced diet but the amount you have makes a big difference.

For instance: Reducing a daily cola intake from 2 x 600mL bottles (2088kJ) to 1 x 200mL mini can (348kJ) = 25 teaspoons less added sugar per day.

Over a year, this small change could result in over 17kg of weight loss. contains no nutrients and has almost as much energy as fat (almost double carbohydrates and protein). One ‘standard’ drink contains 10g of alcohol (or 290kJ).

However, the size of a ‘standard’ drink can vary not only by alcohol percentage, but the amount of energy it has – such as a shot of alcohol mixed with tonic water or lemonade. Also, when we drink alcohol our inhibitions tend to be lowered, making it more likely we will crave less healthy foods. Foods considered ‘clean’, raw or organic may be nutritious, but they may not be.

There are benefits to choosing foods that are minimally processed. But there are also many other nutritious foods that will be missing from your diet if you eliminate whole food groups.

Be careful of products that claim to be organic

Although they might have been produced in an organic manner, this does not guarantee it’s a food that should be consumed regularly as part of a healthy lifestyle.

If choosing organic, it is important to select a variety of foods that fit within the The amount of information available on food, diet and weight loss is endless and not much of it is credible or correct.

Popular media is full of fad diets and magic weight loss potions endorsed by celebrities and supported by personal success stories.

Much of what is claimed is based on anecdotal rather than scientific evidence and, many times, there is something to be gained by the person or organisation behind the claim (such as profit from sales). Unlike other fields where experts are trusted when it comes to nutrition and health, it seems that everyone is an expert.

While it’s true that we’re all different and what works for some may not work for others, proper scientific studies include a wide range of people – to account for individual differences.

If you would like to lose weight, a good start would be basing your diet on foods that fit within the. Or see a qualified health professional (such as a dietitian) who will give you dietary advice that is evidence-based, tailored to your nutritional and health needs and suits your lifestyle. The best way to lose weight is slowly, by making small, achievable changes to your eating and exercise habits.

Rather than being a slave to the number on the scales, be guided by your waist circumference – a is less than 94cm for men and less than 80cm for women. Suggestions for safe and effective weight loss include: Don’t crash diet. You’ll most likely regain the lost weight within 5 years.

Be mindful of the portions you’re consuming – the bigger the serve, the more energy. (This is especially important for energy-dense foods and drinks such as those with high amounts of fats and alcohol.) Cut back on refined and added sugars. Increase your intake of fresh fruit, vegetables, and wholegrain breads and cereals.

Cut back or eliminate empty kilojoules from sugary drinks and alcohol.

Eat less takeaway and snack foods

Exercise for approximately 30 minutes on most days of the week. Introduce more movement into your day (such as a 30 minute walk). Don’t eliminate any food group. Instead, choose from a wide range of foods every day and choose ‘whole’, less-processed foods.

Have a regular pattern of eating and stick to it. Ultimately, to avoid weight gain, energy intake should not be more than energy output. Avoiding large portion sizes and limiting intake of saturated fats and added sugars will help to keep your energy intake in check.

Regular exercise is also critical for long-term weight loss success.

If you are not sure where to start or finding it difficult to manage your weight, seek help from a dietitian. Dietitians can guide you to a healthy way of eating that is based on the latest research and tailored to suit your health and lifestyle.

About obesity More Americans are overweight or obese children are overweight or obese. This means that obesity-related disorders (such as coronary heart disease and diabetes No magic weight loss potion There are many unhealthy misconceptions about weight loss eat and increase your level of physical activity Understanding energy from food When we eat, our bodies are supplied with different nutrients.

This includes vitamins, minerals , antioxidants and energy from the macronutrients – carbohydrates , protein and fat Alcohol Kilojoules in food In United States, kilojoules (kJ) carbohydrate = 17kJ protein = 17kJ fat = 37kJ That’s not to say fats don’t form part of a nutritious diet, because they do.

What matters is the type and amount of fat Balancing energy needs age body size gender how active you are your genetics whether you’re pregnant or breastfeeding The important thing is to have a balanced diet There are many common misconceptions about weight management Carbohydrates do not make you fat Carbohydrates are also an important energy source during exercise.

The digestive system Carbohydrates with lower glycaemic indexes (GI) wholegrains , legumes and fruit If you are on a low-carbohydrate diet, and cutting out large groups of vegetables constipation because of their low fibre Watch portion size and saturated fats Likewise, to gain weight Low carbohydrate diets - risks brain may feel a bit fuzzy Short-term health effects of low-carb diets Initially, low-carbohydrate diets may contribute to rapid weight loss nausea dizziness constipation fatigue dehydration bad breath (halitosis) Long-term health effects of low-carb diets Weight gain Bowel problems Dieting problems High cholesterol , obesity and obesity-related disorders cancer Kidney problems Osteoporosis and related conditions Keto diet - risks Single food diets don’t work iron Superfoods can’t help with weight loss metabolism Skipping meals will not make you lose weight Intermittent fasting As with any diet, being able to Eliminating foods will not lead to weight loss Unless you don’t like a food or choose to go vegetarian or vegan elevated blood pressure Going gluten-free for health is only for people with coeliac disease or those sensitive to gluten Many drinks contribute to weight gain We need to drink fluids to avoid dehydration, and water is the best choice Plain milk soft drinks and slushies alcohol sports drinks flavoured milks packaged iced teas Alcohol has almost as much energy as fat Alcohol ‘Clean’, raw or organic foods is not the solution to weight loss American Guide to Healthy Eating Science matters when it comes to weight loss American Guide to Healthy Eating The key to weight loss healthy waist circumference Try to choose a variety of foods that fit within the American Guide to Healthy Eating Watch your energy (kilojoule) intake Where to get help Your GP (doctor) Dietitians United States 1800 812 942 – to find a dietitian near you .

Key Points

Carbohydrates are essential for a well-balanced diet and healthy body
These types of diets can increase your risk of micronutrient deficiencies and content
because they restrict kilojoules or energy
Symptoms that may be experienced from a low-carbohydrate diet, include: loss of appetite
– restricted intake of antioxidants and fibre from fruits and vegetables can increase a person’s risk of constipation