Why do mustard, ketchup, and salsa require kosher certification?

Mustard, ketchup, and salsa require kosher certification primarily because they sometimes include non-kosher vinegar as an ingredient. Vinegar can be derived from a variety of sources, including wine or other fermentation processes that may not comply with kosher standards. Therefore, if vinegar is not produced under strict rabbinical supervision, it could render the entire product non-kosher. Obtaining kosher certification ensures that all ingredients, including vinegar and any other potential sources of non-kosher additives, meet the requirements of kosher dietary laws.

While there could be concerns related to meat ingredients or production facilities, these factors are less commonly applicable to these condiments. Additionally, the organic status of ingredients does not pertain to kosher certification, making the focus on vinegar relevant in the context of kosher dietary guidelines.