With the curing process, the nitrite content in kimchi was the highest in the first week. After 10, it generally begins to decline; After 20 days, it basically disappeared. It is safer to eat pickled sauerkraut, preferably after one month.

：

Matters needing attention in eating sauerkraut

Sauerkraut should be stewed and cooked thoroughly before eating. Long-term gluttony of pickled cabbage with poor quality, poor food hygiene, mildew and short curing time may cause urinary calculi. Eating pickled cabbage contaminated by miscellaneous bacteria, moldy and containing too much nitrite due to short curing time will turn hemoglobin in blood into methemoglobin without oxygen-carrying function, make red blood cells lose their oxygen-carrying ability, lead to tissue hypoxia, and cause symptoms of nitrite poisoning such as cyanosis of skin and lips, headache, dizziness, nausea and vomiting, palpitation, and even death in severe cases. When eating sauerkraut, you should pay attention to eating it in moderation and cooking it before eating it to avoid some side effects after eating it raw, which is not good for your health.