I have read lots on this, having experienced and posted about constant sugar cravings.
Having reduced my sugar intake to a sensible amount of natural sugars I can state that in a relatively short period of time used on this change I feel much much better for it.
And I didn't find it as difficult as I thought it would be.
I agree abstinence of alcohol is priority number 1 but that does not mean ignoring anything else that you notice is a little off or needs some attention!