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High levels of sugar in the blood can cause tiredness, heart disease, strokes, blindness, nerve damage and kidney disease, reports the journal Food and Function.
The condition occurs when the pancreas is unable to produce enough insulin - the hormone that regulates blood sugar - or when its insulin does not work properly, according to the Daily Mail.


Just a small glass of red wine (120 ml) contains as many of these active ingredients as a daily dose of an anti-diabetic drug, the researchers found.


Although the study didn't look at the effects of wine on people, study authors believe moderate drinking as part of a calorie controlled diet could protect against type 2 diabetes.


Past studies have shown that natural chemicals found in grape skin and wine called polyphenols can help the body control glucose levels, and prevent potentially dangerous spikes or dips in blood sugar.
The new study compared the polyphenol content of 12 different wine varieties. The team, from the University of Natural Resources and Applied Life Sciences, Vienna, found that levels were higher in red wines.


Alcohol can make blood glucose too high or too low. Moderate amount of alcohol can cause blood sugar to rise but excess alcohol can actually decrease your blood sugar level (sometimes to dangerous levels). When you drink, the alcohol goes from your stomach straight into your blood. Within 30 to 90 minutes after drinking, the alcohol in your bloodstream hit its highest point.
When there is no alcohol in your blood, liver keeps blood sugar level from going too low by changing stored carbohydrate into glucose, the glucose is then release into your blood. However, when alcohol enters your system, the liver treats alcohol as a toxin and works to rid the body of alcohol as quickly as possible. Until the alcohol has been processed and cleared, the liver will not produce glucose again. It takes your liver about 2 hours to break down one drink. If you drink alcohol faster than your liver can breaks it down, the liver will be busy breaking down alcohol and therefore will not be able to release glucose into your blood. This causes your blood glucose level to continue to drop and you may end up with very low blood sugar.


You can't fully enjoy your bottle of red wine without the proper glass to complement it. Red wine glasses are shorter than white wine glasses, wider and not as tall. They kind of look like a bowl, where as white wine glasses are tall and slim. 
The reason why you should choose the appropriate glass for your wine is that if you pour red wine into a white wine glass only a small part of the wine will come in contact with the air. And the key to enjoying the flavor of red wine is to allow it to oxidize. What this means is that you are trying to get the wine to aerate. As it breathes, the character of the wine is allowed to come out. This is also the reason why you would swirl the wine before taking a sip. 
1. Observing. Look at the wine.
2. Sniffing. Take a quick sniff for "off" odors.
3. Aerating. Rotate and swirl the wineglass in a circular motion in order to release the wine's aroma.
4. Smelling. A variation on the sniff, done after aeration, in which you concentrate on the wine's bouquet, smells, and aroma.
5. Tasting. Aerate the wine in your mouth and swallow.
6. Savoring. Concentrate on the wine's finish (the sensation and flavors left in your mouth after swallowing).


Research indicates that in general, the level of alcohol consumption associated with the least risk for people with diabetes is the same as that for the general population. It is recommended to limit alcohol intake to one drink for women and two drinks men.
One drink is defined as:-
300 ml of regular beer (150 calories),
120 ml of wine (less then 100 calories),
45 ml "shot" of distilled liquor (100 calories).


People with severe diabetes or people who take certain diabetes medications/insulin, and/or have diabetes related complications are recommended to consult their doctor for more personalized advice.