Posts Tagged ‘carbohydrates’

Why Low Glycemic Foods? Part 2 of 2

Saturday, January 9th, 2010

You can read more about the glycemic index (GI) and view the whole table http://www.mendosa.com/gi.htm here. This site is authored by David Mendoza, a freelance medical writer and consultant specializing in diabetes. The site is a gold mine of information.

Mr. Mendoza points out that a foods glycemic index tells you how rapidly a particular carb turns into sugar, but not how much of that carbohydrate is in a serving. In other words, its not just the quality of the carb, but also the quantity, that counts.
The version of glycemic index on his site (courtesy of Professor Jennie-Brand Miller of the University of Sydney) includes a column called glycemic load (GL) as well as a column of serving size in grams. A glycemic load of 20 or more is considered high; 11 to 19 is medium; and 10 or less is low.

Looking at this bigger picture, some of the bad carbs in low-glycemic food diets turn out to be not so bad. A 120g serving of watermelon has a horrible GI of 74 but a very low GL of 4. A medium banana (129g) has a bad GI of 51 but a medium GL of 13. An 80g serving of carrots has a borderline GI of 47 but a low GL of only 3. The same amount of corn has a GI of 47 but a low GL of 7.

On the other hand, some carb foods look bad whether you go by the GI or the GL. A 70g bagel has a high GI (72) as well as a high GL (25). A 150g serving of boiled white rice has a GI of 56 and a GL of 24. A medium baked potato (159g) has a high GI (60) and a marginal GL (18).

If you decide to concentrate on low-glycemic foods, I recommend you focus on a foods glycemic load. Just be careful to adhere to the indicated serving sizes (or adjust the calculation accordingly), GL is a better measure of how much sugar in total is being poured into the bloodstream and the amount of sugar that will be stored as fat.

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What Good and Bad Fat can do to Your Health – Part 1

Thursday, November 19th, 2009

High consumption of fat or the combination of fat and carbohydrates causes obesity, heart disease and other health problems. However the different types of fat have very different effects on the health. Here is a list of the different fat categories and their effects on our bodies and health:

Mono-unsaturated fat – This type of fat prevents heart disease and circulatory disease taken in moderate amounts.

Omega-6-poly-unsaturated fat – This fat type prevents heart disease if you do not consume too much of it. However, it causes inflammatory reactions. This type of reactions are benign when they are moderate and when they are provoked to fight disease. But a constant high inflammatory response is dangerous, and can cause rheumatism, heart trouble and cancer. A very high consumption of this type of fat is therefore dangerous.

Omega-3-poly-unsaturated fat – This type of fat prevents heart disease and reduces inflammatory reactions if taken in moderate amounts. Therefore it also reduces the risk of cancer, intestinal inflammations and rheumatism.

Omega-9-poly-unsaturated fat – This type of fat also acts as Omega 3 does.

Saturated Fat – This type of fat is probably not dangerous in small amounts. In higher amounts, saturated fat gives high cholesterol levels, causes clogging of the blood vessels, causes coronary heart disease and increases the risk of infarct of the heart and other organs.

Trans-fat – This type of fat is produced by chemical processing to yield specific mechanical properties. Margarine often contains this type of fat. This type of fat is dangerous, and can be considered a component for heart disease and cancer. There is however one exception: some amount of fat containing trans acid conjugated linoleic acid seem to be benevolent for skin health and may help reduce weight. Conjugated linoleic acid is found in milk and butter.

Cholesterol – Cholesterol is a fat-like compound found in food, but also synthesized from saturated fat by the body. High intake of saturated fat or of cholesterol itself therefore elevates the cholesterol level in the body. Cholesterol is a necessary compound, but in higher amounts it causes clogging of the blood vessels, causes coronary heart disease and increases the risk of infarct of the heart and other organs.

Only about 20% of cholesterol is ingested from food while 80% is made by your liver.

The average American and European diet generally contains too much fat and carbohydrates combined. The fat consumed is generally a mixture of trans fat, saturated fat and omega-6-poly-unsaturated fat. Consuming this combination of bad fats causes overweight and is probably a major contributing component for the incidence of heart disease, cancer, intestinal inflammatory diseases, rheumatism and other inflammatory conditions.

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Understanding Fats and Carbohydrates and Their Role in a Healthy Diet

Friday, November 13th, 2009

In recent times it would give the impression that fats and carbohydrates have both gotten a bad rap.  First it was fat that was the culprit in all dietary ills, and low fat diets were all the rage.  Then the two switched places, with carbohydrates being the bad guys and fat reigning supreme.

Both fats and carbohydrates play an important role in nutrition, and both are vital to a healthy diet.  It would be impossible and unwise to remove all fat from the diet, since fat is important for the production of energy, and for carrying valuable fat soluble vitamins like vitamin D, vitamin E and vitamin K, throughout the body.  In addition, fat plays a very important role in regulating various bodily functions.

Even though some fat is essential to a healthy body, too much fat can be harmful.  Excessive levels of dietary fats have been implicated in heart disease, stroke, high cholesterol levels and even some cancers.  Most nutritionists suggest limiting daily fat intake to less than 20% of calories, although taking that level lower than 10% is not recommended.

The type and amount of fat in the diet makes all the difference.  A diet high in saturated fats, trans fats and cholesterol has been associated with a variety of ills, including heart disease, stroke and other related diseases.  In addition, many long-term chronic problems, such as obesity, are associated with high levels of dietary fats.

Food labels do make the complex process of choosing the right fats somewhat easier.  For instance, trans fats will be listed on the ingredient list of foods that include them.  In general, trans fats are found mainly in processed foods. When limiting your daily intake of fat and cholesterol, it is good to have an understanding of nutritional labels. This government mandated labels could be a huge help to those who take the time to read and be aware of them.

Carbohydrates are an important part of a healthy diet as well, and carbs are necessary for providing energy and many vital nutrients.  Carbohydrates are found in fruits and vegetables, in grains and in milk and dairy products.  It is important to choose carbohydrates carefully, however, since not all are equally healthy.

Keeping saturated fats and trans fats to a minimum is important to a healthy diet.  Trans fats, which are solid at room temperature, are most often found in highly processed foods like cookies, cakes and other baked goods.  In addition, trans fats are often found in fried foods and in salty snacks like potato chips.  While these foods are fine in moderation, it is best to avoid large quantities of such snacks.

As with many products, less is often more when it comes to choosing foods rich in carbohydrates.  For example, less refined whole grain bread is generally more nutritious than white bread, which has gone through a greater amount of refining.  That is because the refining process tends to decrease nutrient content over time.

Of course, there are some elements in the diet that should be limited.  Two of these elements are sugar and salt.  Most Americans consume too much salt and sugar, and this has led to epidemics of obesity, diabetes, heart disease and other ills.  Limiting sugar and salt, while choosing good fats and unrefined carbohydrates, is a great way to make the most of the nutritional value of the foods you eat.

There’s a lot to understand about Fats and Carbohydrates. We were able to provide you with some of the facts above, but there is still plenty more to write about in subsequent articles.

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