Thursday, January 31, 2013

Carbs and Cataracts

It turns out that high levels of carbohydrate intake cause an increase in one type of cataract! High Glycemic Index carbs, foods that cause a rapid uptake in carbohydrates from a very strong insulin spike, seem to be particular causes.

How might this occur? It turns out that excess glucose from high glycemic index carbohydrates creates damaged proteins in the lens of the eye. These damaged proteins are then poorly recognized because of the "machinery" that removes these proteins is also affected by the excess glucose in a bad way. The result is an increase in the generation of cortical cataracts.

It's amazing how much we are now learning about the risks of high carbohydrate diets, especially from high glycemic index carbohydrates, even in people who don't have diabetes. First Macular Degeneration and now cataracts. It seems there's still lots to learn about what makes an "eye healthy" diet!

Wednesday, January 30, 2013

The GI Symbol and Your Food Labels




 What is the GI Symbol?

The Glycemic Index Symbol is a powerful tool for quickly and reliably making healthy food choices when grocery shopping. It’s your guarantee that the GI value stated near the nutrition information label is accurate. Foods with the GI Symbol are healthy in other ways, too.
To be approved to carry the GI Symbol, foods must be a good source of carbohydrate and meet a host of other nutrient criteria including calories/kilojoules, total and saturated fat, sodium (salt), and where appropriate fibre and calcium.





The GI Symbol makes healthy choices easy choices. Most of us find it hard to work out what all of the different nutrition claims and nutrition information means, and just because a food may claim to be low GI, it does not mean that it has been tested correctly, if at all. Foods that carry the GI Symbol meet strict nutrient criteria ensuring they are healthy choices, and the GI value is certified as accurate.

Managing your blood glucose levels is one of the keys to lifelong health. Choosing low Glycemic Index carbohydrates – the ones that produce smaller fluctuations in your blood glucose and insulin levels – reduces your risk of type 2 diabetes and cardiovascular disease. It’s also one of the keys to sustainable weight loss.
Low GI eating is for everybody. The GI Symbol helps you put those smart low GI carbohydrate foods into your shopping trolley and lower the overall GI of your diet.

© 2013 THE GI FOUNDATION, ALL RIGHTS RESERVED

Tuesday, January 29, 2013

10 Tips for Reducing the GI of Your Diet

1. Pile half your dinner plate high with vegetables or salad
Aim to eat at least five servings of vegetables (this doesn’t include the starchy ones like potatoes, sweet potatoes or sweet corn) every day, preferably of three or more different colors.

2. Be wise with your potatoes
If you are a big potato eater and can't bear the thought of giving them up, you don't have to. Just choose wisely, and be careful with the quantity. Choose one or two medium-sized low GI potatoes such as Carisma, or a lower GI potato such as Nicola or Marfona or have one or two baby new potatoes with a small cob of corn or make a cannellini bean (they are white beans) and potato mash replacing half the potato with cannellini beans. Don't be afraid of trying other starchy vegetables like sweet potato, yams or taro - steamed, roasted or mashed.

3. Swap your bread
Instead of high GI white and wholemeal breads, choose a really grainy bread where you can actually see the grains, granary bread, stone-ground wholemeal bread, real sourdough bread, soy and linseed bread, pumpernickel, fruit loaf or bread made from chickpea or other legume-based flours.

4. Replace those high Glycemic Index crunchy breakfast flakes
These refined breakfast cereals spike your blood glucose and insulin levels. Replace them with smart carbs like natural muesli or traditional (not instant) porridge oats or one of the lower GI processed breakfast cereals that will trickle fuel into your engine.

5. Make your starchy staples the low GI ones
Look for the low GI rice's, serve your pasta al dente, choose less processed foods such as large flake or rolled oats for porridge or muesli and intact grains such as barley, buckwheat, bulgur, quinoa, whole kernel rye, or whole wheat kernels and opt for lower GI starchy vegetables.

6. Learn to love legumes (pulses)
Include legumes like beans, lentils and chickpeas in your meals two or three times a week, more often if you are vegetarian. Add chickpeas to a stir-fry, red kidney beans to a chili, a 4-bean salad to that barbecue menu, and beans or lentils to a casserole or soup.

7. Develop the art of combining
No need to cut out all high GI carbs. The trick is to combine them with those low GI tricklers to achieve a moderate overall GI. How? Lentils with rice (think of that delicious classic Italian soup), rice with beans and chili (go Mexican), tabbouleh tucked into pita bread (with falafels of course and a dash of hummus), baked beans on toast or piled on a jacket-baked potato for classic comfort food.

8. Incorporate a lean protein source with every meal
Eat lean meat, skinless chicken, fish and seafood, eggs, milk, yogurt or cheese, or legumes and tofu if you are vegetarian. The protein portion should make up around a quarter of the plate/meal.

9. Tickle your taste buds
Try vinaigrette (using vinegar or lemon juice with a dash of extra virgin olive oil) with salads, yogurt with cereal, lemon juice on vegetables like asparagus, or sourdough bread. These foods contain acids, which slow stomach emptying and lower your blood glucose response to the carbs in the meal.

10. Go low GI when snacking
If it is healthy and low GI, keep it handy. Grab fresh fruit, dried fruit, or fruit and nut mix, low fat milk and yogurt (or soy alternatives). Limit (this means don't buy them every week) high GI refined flour products whether home baked or from the supermarket such as cookies, cakes, pastries, crumpets, crackers, biscuits, irrespective of their fat and sugar content. These really are the 'keep for the occasional treat' foods.

Keep your eye on the serving size. Remember portion caution with carb-rich foods such as rice, al dente pasta and noodles, potatoes etc. Eating a huge amount of these foods, even of the low GI variety, will have a marked effect on your blood glucose. A cup of cooked noodles or al dente pasta or rice plus plenty of mixed non-starchy vegetables and a little lean protein can turn into 3 cups of a very satisfying meal.


Friday, January 25, 2013

The Health Benefits of Low GI Eating





The scientific evidence supporting the health benefits of a healthy low GI diet is overwhelming. We know from over 30 years of research from around the world that healthy low Glycemic Index diets:
  • Help to fill you up and keep you feeling satisfied for longer, avoiding over eating or too much snacking.
  • Lower your insulin levels which makes fat easier to burn and less likely to be stored.
  • Help you to lose body fat and maintain lean muscle tissue.
  • Reduce your triglycerides, total and 'bad' (LDL) cholesterol.
  • Increase your levels of 'good' (HDL) cholesterol.
  • Reduce your risk of developing type 2 diabetes.
  • Help to manage your blood glucose levels and reduce your risk of developing diabetes complications.
  • Reduce your risk of developing cardiovascular disease.
  • Reduce your risk of developing some cancers
  • Reduce your risk of developing certain eye diseases.
  • Improve your skin
  • Sustain your energy levels longer, improving both mental and physical performance.
Low GI eating really is for everyone.

Knowing the GI of foods is of particular value to people with diabetes who need to manage their blood glucose levels carefully. Perhaps unsurprisingly, diabetes organizations such as Diabetes AustraliaCanadian Diabetes AssociationEuropean Association for the Study of DiabetesJuvenile Diabetes Research Foundation and the South African Diabetes Association encourage an understanding and use of GI in meal planning.
However, lowering the GI of your diet can also lead to better health  through improved heart health and helping to manage appetite.
Health and nutrition authorities from around the world recommend that everyone use the GI as a tool when looking for healthy food choices:
© 2013 THE GI FOUNDATIOn

Thursday, January 24, 2013

Defining Low, Medium and High Glycemic Foods


Why might the low Glycemic Index Number of your favorite Snickers bar still not be the healthiest choice for you?

Determining whether a food is high- or low-glycemic is pretty straightforward. The glycemic index is broken into high-, medium-, and low-glycemic foods. High-glycemic-index foods have the quickest blood sugar response; low-glycemic-index foods have the slowest. Here are the measurements on a scale of 0 to 100:
  • Low glycemic index: 55 or less
  • Medium glycemic index: 56 to 69
  • High glycemic index: 70 or greater
Keep in mind that high-glycemic foods aren’t necessarily unhealthy foods. Similarly, low-glycemic foods aren’t always healthy. The glycemic index simply lets you know how quickly your blood sugar will rise from eating that food.
The following table shows the glycemic index numbers and measurements of some popular foods. Some foods fall right into line with what you probably predicted: Brown rice is a low-glycemic food, and basmati white rice and spaghetti are medium-glycemic foods. But it’s not always that clear-cut. Notice how jasmine rice has a significantly higher glycemic index number than basmati rice even though both types of rice are white? This is where specific types of products vary. Even though foods of the same type may appear the same, each variety can produce a different blood sugar response for many reasons.
The Glycemic Lowdown on Some Popular Foods
FoodGlycemic Index NumberMeasurement
Peanut M&M’s33Low
Snickers bar43Low
Brown rice48Low
Whole-wheat bread52Low
Basmati white rice57Medium
Spaghetti58Medium
Plain bagel69Medium
Watermelon72High
Jasmine rice89High
Baked potato without skin98High
Note that some candy has low glycemic content, whereas baked potatoes and watermelons have some of the highest. This doesn’t mean that candy is suddenly healthier for you than a potato or fruit. Baked potatoes and watermelons are high in many different vitamins, minerals, and fiber as well as glycemic content, and candy is high in lots of undesirable categories such as calories — and empty calories at that!

By Meri Raffetto from The Glycemic Index Diet For Dummies

Wednesday, January 23, 2013

Trends In Treating Astigmatism

The surgical revolution in treating astigmatism began with the onset of Radial Keratotomy (RK) in the late 1970's and continued into the era of Laser Vision Correction. When a cataract was to be replaced, if you had astigmatism you either had to undergo a procedure like RK called a Limbal Relaxing Incision (LRI) during or after the surgery, or a laser procedure like LASIK or PRK. These all work well.

About 5 years ago there was a new development in Intra-Ocular Lenses (IOL) that not only improved vision after cataract surgery, but also treated astigmatism: Toric IOL's. A study of refractive cataract surgeons like our Dr. White recently reported that 75% now prefer to use these new IOL's rather than LRI's in patients with astigmatism.

"We really like the Alcon Toric IOL when we are aiming to make our  Cleveland patients independent from glasses for their distanc vision needs like driving or watching TV," said Dr. White.  "Our golfers are particularly happy!"


Extra pre-operative measurements like corneal topography are necessary to choose both the power and the orientation of the IOL. Once it's in the eye it is amazingly stable!



The technology of cataract surgery now includes multiple ways to address astigmatism. Dr. White and a majority of the top surgeons in the United States are now opting for a Toric IOL in cases where astigmatism is treated during the surgery.

Tuesday, January 22, 2013

About The Glycemic Index


       Intro to the Glycemic Index (GI) 

1)   What is the GI?
Carbohydrates are one of the best sources of energy for our bodies. The simplest form of carbohydrate is glucose, which is:
  • A universal fuel for most organs and tissues in our bodies.
  • The only fuel source for our brains, red blood cells and a growing fetus, and is
  • The main source of energy for our muscles during strenuous exercise.
Surprisingly, most of us don't eat too much carbohydrate, but all too often we eat the wrong kind, because not all carbohydrates are created equal. This is where the glycemic index or GI comes in. It's about recognizing the 'smart carbs' - the low GI ones - and making sure we include them in our main meals and snacks.
The GI is simply a dietary tool that helps us differentiate between the various carbohydrate foods we eat and how our bodies use them.
  • Carbohydrates with a low GI (55 or less) don't make our blood glucose levels rise very high for very long. They provide sustained energy.
  • Carbohydrates with a high GI (70 or more) are the ones that cause our blood glucose levels to go higher for longer. High blood glucose may cause damage to vital organs.
Research has shown that if we eat too many high GI foods and not enough low ones, we are at risk of developing significant health problems.
For more on the GI, visit: www.glycemicindex.com

 
2)   Good sources of carbohydrate
Carbohydrate foods come mainly from plants - cereal grains, legumes, fruit and starchy vegetables. Some dairy foods like milk and yogurt also contain carbohydrate. Common sources of carbohydrate include:
  • Bread
  • Breakfast cereals
  • Rice
  • Pasta
  • Noodles
  • Fruits and their juices such as apples, pears, oranges, plums, peaches and nectarines, berries and bananas
  • Starchy vegetables such as potatoes, sweet potatoes, yams, taro, sweet corn, parsnips, pumpkin and carrots
  • Legumes (pulses) such as beans, chickpeas, lentils and split peas
  • Dairy foods like milk, yogurt, ice cream and their alternatives
  • Sugars, honey and confectionery
  • Starchy snack foods like potato and corn chips

 
3)   The health benefits of low GI eating
The scientific evidence supporting the health benefits of a healthy low GI diet is overwhelming. We know from over 30 years of research from around the world that healthy low Glycemic Index diets:
  • Help to fill you up and keep you feeling satisfied for longer, avoiding over eating or too much snacking.
  • Lower your insulin levels which makes fat easier to burn and less likely to be stored.
  • Help you to lose body fat and maintain lean muscle tissue.
  • Reduce your triglycerides, total and 'bad' (LDL) cholesterol.
  • Increase your levels of 'good' (HDL) cholesterol.
  • Reduce your risk of developing type 2 diabetes.
  • Help to manage your blood glucose levels and reduce your risk of developing diabetes complications.
  • Reduce your risk of developing cardiovascular disease.
  • Reduce your risk of developing some cancers
  • Reduce your risk of developing certain eye diseases.
  • Improve your skin
  • Sustain your energy levels longer, improving both mental and physical performance.
Low GI eating really is for everyone.