What are the black dots in sauerkraut?

The black dots in sauerkraut are typically a result of natural fermentation processes or can be due to the growth of certain molds or yeasts. These spots are often harmless, but they can indicate spoilage if they appear alongside off odors or unusual textures. It's advisable to inspect the sauerkraut carefully; if it smells or looks bad, it's best to discard it. Always ensure proper fermentation techniques to minimize such occurrences.