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Friday, January 13, 2012

Glycemic Index


  • In the past, we used the terms simple and complex to describe carbohydrates
  • The problem some complex carbs caused a rise in blood sugar similar to simple carbs
  • Now we use the term Glycemic index
  • Measures how fast food is likely to raise your blood sugar
  • Glucose is given an arbitrary value of 100 and other carbs are given values relative to glucose
  • The impact a food will have on blood sugar depends on many factors such as:
    • Ripeness
    • Cooking time
    • Fiber content
    • Fat content
    • Time of day
    • Blood insulin levels
    • Recent activity
    • Particle size
  • Low glycemic index foods are those values less than 55—these are foods that as they are digested produce a low, slow blood sugar response
  • Intermediate glycemic index are those values between 55 and 70
  • High glycemic index are those values greater than 70—these foods are quickly broken down in the intestine and cause the glucose level to rise quickly
  • GI, however, tells you only how rapidly a particular carb turns into glucose. It tells the quality of the carb. It does not tell you how much of that carb is a serving for a particular food (quantity)
  • Glycemic Load takes quantity of available carbs into account. Glycemic load equals the GI times the number of carb grams in a food

Lets be careful!!!!!!!! The worth of any food cannot be measured by a single number, but a single number can tell you a great deal about how the carb in that food affects blood glucose levels. For instance, the number tells us nothing about the nutritional value, vitamin/mineral content, or fiber content. The numbers can be misleading. Some worthless foods like diet soda have low numbers and nuts, for instance, have higher values.

  • Meal planning:
    • Hulless barley in the rice cooker sweetened with splenda and cinnamon
    • Bread is near 100 on the GI, but using a different grain such as corn, soybeans, oat bran, or barley are good choices. Burgen Soy Lin in the lowest GI bread available
    • Pasta substitutes include Shirataki noodles in the refrigerated section. No need to boil them….simply heat up and eat. Any other high fiber pasta is appropriate to substitute
    • Cereals such as Mc Cann’s Irish Oatmeal which are steel cut oats instead of rolled oats
    • Chips such as Trader Joe’s Soy and flaxseed Tortillas
    • Veggies
    • Nuts such as walnuts
    • Dry roasted Edamame and frozen variety in place of higher glycemic veggies (peas, carrots, corn)

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