It's easy to get answers about health and nutrition! Just send your question by email to and Dr. Harlan will respond to selected questions of general interest. Answers will be posted in the Ask Dr. Gourmet newsletter (sign up now!) and archived in the Ask Dr. Gourmet section of the website.

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Ask Dr. Gourmet

How long will white wine vinegar last?

Can you tell me if there is a use by date for Dufrais Saugignon Blanc White Wine Vinegar?

Dr. Gourmet Says...

a clear glass flask containing white wine vinegar

Generally speaking, vinegars keep well because they are acidic enough to prevent bacterial growth. That said, I have a rule of thumb about all foods and how long they can be used after opening:

If in doubt, throw it out.

Thanks for writing,

Timothy S. Harlan, MD, FACP
Dr. Gourmet