For most foods, the fresher they are, the more nutritious they are. However, experts point out that pickles are the exception and should not be "fresh".
Many people prefer to eat pickles that have been pickled for a short time, but such pickles are extremely dangerous. In pickles that have been brined for 24 to 72 hours, the nitrite content reaches its peak. Since nitrites can cause symptoms of hypoxia in the human body and can also combine with secondary amines in food to form carcinogenic nitrosamines, consuming them at this stage will undoubtedly increase the risk of illness. Therefore, it is best to eat pickles after they are fully cured, with 4 weeks being the optimal time for consumption.
Before pickling, the vegetables must be washed thoroughly; otherwise, some microorganisms and parasite eggs will not be completely killed. In addition, if the pickle brine becomes cloudy, turns black, develops an off-odor, has a bad color, or shows signs of spoilage such as maggots, the pickles and brine should be discarded immediately. The pickle jar must then be sterilized and disinfected at a high temperature to prevent contamination. After that, a new brine should be prepared to pickle the vegetables again.