Nutrition PDF Print E-mail
 

Fats - The Good, The Bad, and The Healthy Diet

 

"Eat a low-fat, low-cholesterol diet." Most of us have heard this simple recommendation so often over the past two decades that we can recite it in our sleep. Touted as a way to lose weight and prevent cancer and heart disease, it's no wonder much of the nation - and food producers - hopped on board.Unfortunately, this simple message is now largely out of date. Detailed research shows that the total amount of fat in the diet, whether high or low, isn't really linked with disease. What really matters is the type of fat in the diet. Bad fats increase the risk for certain diseases and good fats lower the risk. The key is to substitute good fats for bad fats.

 The Bad Fats

Some fats are bad because they tend to worsen blood cholesterol levels. 

Saturated Fats - Saturated fats are mainly animal fats. They are found in meat, seafood, whole-milk dairy products (cheese, milk, and ice cream), poultry skin, and egg yolks. Some plant foods are also high in saturated fats, including coconut and coconut oil, palm oil, and palm kernel oil. Saturated fats raise total blood cholesterol levels more than dietary cholesterol because they tend to boost both good HDL and bad LDL cholesterol. The net effect is negative, meaning it's important to limit saturated fats.

Trans Fats - Trans fatty acids are fats produced by heating liquid vegetable oils in the presence of hydrogen. This process is known as hydrogenation. The more hydrogenated an oil is, the harder it will be at room temperature. For example, a spreadable tub margarine is less hydrogenated and so has fewer trans fats than a stick margarine.Most of the trans fats in the Western diet are found in commercially prepared baked goods, margarines, snack foods, and processed foods. Commercially prepared fried foods, like French fries and onion rings, also contain a good deal of trans fat.Trans fats are even worse for cholesterol levels than saturated fats because they raise bad LDL and lower good HDL. While you should limit your intake of saturated fats, it is important to eliminate trans fats from partially hydrogenated oils from your diet. 

The Good Fats

Some fats are good because they can improve blood cholesterol levels. 

Unsaturated Fats--Polyunsaturated and Monounsaturated

Unsaturated fats are found in products derived from plant sources, such as vegetable oils, nuts, and seeds. There are two main categories: polyunsaturated fats (which are found in high concentrations in sunflower, corn, and soybean oils) and monounsaturated fats (which are found in high concentrations in canola, peanut, and olive oils). In studies in which polyunsaturated and monounsaturated fats were eaten in place of carbohydrates, these good fats decreased LDL levels and increased HDL levels.

 

DIETARY FATS

Type of Fat

Main Source

State at Room Temperature

Effect on Cholesterol Levels

Monounsaturated

Olives; olive oil, canola oil, peanut oil; cashews, almonds, peanuts, and most other nuts; avocados

Liquid

Lowers LDL; raises HDL

Polyunsaturated

Corn, soybean, safflower, and cottonseed oils; fish

Liquid

Lowers LDL; raises HDL

Saturated

Whole milk, butter, cheese, and ice cream; red meat; chocolate; coconuts, coconut milk, and coconut oil

Solid

Raises both LDL and HDL

Trans

Most margarines; vegetable shortening; partially hydrogenated vegetable oil; deep-fried chips; many fast foods; most commercial baked goods

Solid or semi-solid

Raises LDL

 

Tips for lowering trans fat intake:

 

Choose liquid vegetable oils or a soft tub margarine that is contains little or no trans fats.  Reduce intake of commercially prepared baked goods, snack foods, and processed foods, including fast foods. To be on the safe side, assume that all such produts contain trans fats unless they are labeled otherwise.  When foods containing hydrogenated or partially hydrogenated oils can't be avoided, choose products that list the hydrogenated oils near the end of the ingredient list.

 

8 Nutrition tips to get in shape

 

It takes a lot of hard work and discipline to achieve an enviable toned body. But with some basic nutritional knowledge you could achieve your goals faster than you think.  Getting the right balance of food, exercise and dedication may seem a hard task but putting your mind to it is the first hurdle. For starters, try following these eight essential nutritional tips.

 1. Eat more often!

By spacing out your meals to every 2.5 - 3 hours you will actually help yourself lose weight. Instead of eating 3 large meals a day, divide this into 6 smaller meals. Not only will the more regular flow of nutrients into your body help raise your metabolism (and burn more fat in the long-run), you will also feel less hungry.

 2. Don't forget Breakfast!

Research has shown that people who miss breakfast find it harder to lose weight. Breakfast, in short, is the most important meal of the day and is essential for getting your metabolism firing. Let this be your biggest meal of the day - after all, you've starved yourself for at least 8 hours whilst sleeping.

 3. Take your time

It can take up to 20 minutes for your brain to register that your stomach is full after you have finished eating. Don't rush your food……savour every mouthful. The more slowly you eat, the fuller you're going to feel.

 4. Eat protein at every meal

Put simply, foods high in protein make you feel fuller quicker and for longer. Choose meats such as chicken, turkey, or low fat mince, or any type of fish. Protein is also essential for lean muscle growth and repair.  The more lean muscle we posses the faster we burn body fat.

 5. Cutting the calories

To lose a pound of body fat, you must burn the equivalent of 3500 calories - now how many packets of crisps is that? If you cut your daily calorie intake by 500 calories a day (about a chocolate bar and a bag of crisps), you'll be losing 1 pound a week. Do this for 3 months and you've lost almost a stone! You don't need to become a calorie counting junkie- just remove foods from your diet you don't really need (however tempting). Increasing the amount of cardiovascular exercise will also help burn the fat. Start of slow and build up - try running for 30 minutes 3 times a week and if you've got more energy, try longer/more regular intervals.

 6. Carbs are good

Carbohydrates are NOT the enemy. We need carbohydrates for energy whether for short bursts or long-sustained energy sources. Without carbohydrates our bodies may find it hard to adjust to this inherent energy deficit. You may have heard of the glycemic index. Without going into too much detail, the GI is a ranking of foods based on their immediate effect on blood sugar levels. Higher GI foods (i.e. more sugary) are required after exercise to replenish drained sources and lower GI foods for the rest of the time. As a rule of thumb, stick to complex carbohydrates which take a long time to digest and have a more prolonged release of energy. Foods rich in complex carbohydrates include vegetables, whole grains, and beans.

 7. Drink Enough Water

Water is a fundamental part of our lives. It is easy to forget how completely we depend on it. Aside from aiding in digestion and absorption of food, water regulates body temperature and blood circulation, carries nutrients and oxygen to cells, and removes toxins and other wastes. Among its other benefits, water plays a major part in weight loss. Since water contains no calories, it can serve as an appetite suppressant, and helps the body metabolise stored fat - it may possibly be one of the most significant factors in losing weight. If you find yourself getting hungry quickly, trying drinking a pint of water to curb your appetite.

 8. Try not to eat before bed

If you're trying to lose weight, this is an excellent method to shift the pounds. Clearly our energy levels plummet whilst we sleep hence it is harder for our bodies to burn the excess calories eaten during the late evening. This is often a simple mistake 'dieters' make early on. Save your food for when you're awake!

Hydration

Humans can survive for up to fifty days without food, yet only a few days without fluids. It is generally agreed that healthy adults need between 2 and 3 litres of fluid each day.

Until the late 1960s athletes were advised not to drink during exercise since it was believed that fluid ingestion made performance worse rather than better.  However since then, sports experts have found that when the body is dehydrated by as little as 1-2 % physical performance declines by as much as 5-10 % and in competitive sports where margins are very small, this could be the difference between winner and losing! 

Symptoms of dehydration:

*Sluggishness

* Nausea

* Headaches

* Light headedness

* General sense of fatigue

* Feeling excessively hot 

When exercising you lose fluid through sweat and through water vapour in the air that you breathe out. However much fluid you lose during exercise depends on; how long you exercise, how hard you exercise, the temperature, your own body chemistry and humidity of your surroundings.  In general, women tend to produce less sweat than men and this is due to both their body size and their greater economy in fluid loss. So finding the right amount of fluid depends upon a variety of individual factors as mentioned earlier the length and intensity of exercise and individual differences. There are however two simple methods of estimating adequate hydration. 

1. Monitor urine volume output and colour. A large amount of light coloured diluted urine probably means that you are hydrated; dark coloured, concentrated urine probably means you are dehydrated. 

2. Weigh yourself before and after exercise. It is recommended to drink pproximately 1.5 times the fluid lost during exercise. The simplest way to work out how much you need to drink is to weigh yourself before and after training. Working on the basis that 1 litre of sweat is equivalent to a 1kg body weight loss, you need to drink 1.5 fluid/kg weigh lost.

SOME FLUID FACTS!

·  The body is made up of around 70% water, so water is the most important nutrient your body needs. 

·   When your body is dehydrated your blood becomes thicker making oxygen, nutrient and energy delivery to your muscles and mind much harder and much less. 

·   When you are dehydrated your brain can’t distinguish between being hungry or thirsty so being dehydrated often leads to over eating. 

·   When you are dehydrated your body can’t get rid of toxins properly, leading to lethargy, bloating, and poisoning of your body. 

·  When you are dehydrated you’re physical activity output decreases by around 30%. 

·   Everything you do, from thinking, digesting and moving is affected when you are dehydrated. 

·  Hair, skin, nails, mood and body shape can all be improved by being hydrated, so get drinking!!!! 

·   Aim to drink about 2-3l of water / water based drinks each day 

What counts as water:  

·        Still water (bottled or filtered) 

·        Herbal teas 

·        Jasmine tea 

·        Hot water & lemon 

·        Veg juice 

·        Naturally carbonated water (avoid drinking regularly as can cause bloating) 

What doesn’t count as water:  

·        Tea 

·        Coffee 

·        Decaf drinks 

·        Fizzy drinks (inc. diet drinks) 

 

Why aren’t you drinking more?!?!?!

Last Updated ( Wednesday, 22 October 2008 15:15 )