QUOTE (emphasis mine):
Sweetened dessert wines are obviously full of sugar and are not recommended. However, moderate consumption of red wine does not raise insulin or impair insulin sensitivity and therefore may be enjoyed. Up to 2 glasses a day is not associated with major weight gain and may improve insulin sensitivity. The alcohol itself, even from beer, seems to have minimal effects on insulin secretion or insulin resistance. 
NOTE (my commentary)
There has beeen concern about the effects of alcohol on insulin resistance. There are studies that show that excessive drinking impairs insulin resistance as well as causing a host of other problems. Binge drinking, which is defined as the consumption of five drinks of alcohol within 2 hours in men or four drinks in women, once a month or more often is associated with an increased risk for developing the metabolic syndrome and type 2 diabetes … Moreover, in one study, binge drinking was associated with type 2 diabetes in individuals that binge drink as rarely as once a month. It is therefore possible that binge drinking induces metabolic derangements that persist after alcohol has been metabolized and cleared from the system. 
moderate consumption of red wine does not raise insulin or impair insulin sensitivity
Dr. Fung, however, does not see a harm in up to 2 glasses a day of red wine. “Up to 2 glasses a day is not associated with major weight gain and may improve insulin sensitivity.”
More alcohol, however, is not recommended.
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SOURCE – Footnotes:
 “The Obesity Code: Unlocking the Secrets of Weight Loss” by Dr. Jason Fung, Timothy Noakes
 Binge Drinking Induces Whole-Body Insulin Resistance by Impairing Hypothalamic Insulin Action by Claudia Lindtner, et al. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3740748/
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Key: Fung-02-20.01 Origin: Last Revision: 02/20/2020