This item is Illegal.
It's not that balsamic vinegar is illegal, it's that what you can get in the store isn't really balsamic vinegar and most have sugar added to them so Elaine doesn't allow it. You can make your own legal substitute though see scdrecipe
I followed the SCD for ONE MONTH, and I never had another problem with my stomach. Never. Ever. I was even able to resume a normal diet after that month. Whatever healing magic the diet works has been permanent in my case. I am now 3 years past those horrifying experiences. Try it. The book costs a few bucks but the diet itself is free. You have nothing to lose but the suffering. I am now able to live the life of a normal, carefree 27-year-old.