Even though this nail treatment is topical rather than taken by mouth, I know that our skin still absorbs everything and it still ends up in the blood stream. I have been so sick for so long, and am afraid to do anything in the wrong direction. So long as it is distilled, it will work. The printed material you mentioned is about distilled vinegar.
Natural vinegar is a whole different substance.
IT is not proper for external use and is the only vinegar fit for internal use. Please excuse me for pressing for details. I'm only seeking to understand. If I understand, I'll remember. Because it has MANY compounds in it that have not been tested for external use.