These people should not eat it. Full article in first comment

Cabbage is widely considered a healthy food, but it isn’t the best choice for everyone. Eating large amounts of raw cabbage may affect thyroid function in some people, while its high fiber and natural compounds can cause bloating, gas, or stomach discomfort in those with sensitive digestion. Fermented cabbage products may also trigger reactions in people who are sensitive to histamine.
For individuals with certain kidney conditions or a history of kidney stones, moderation may also be important. This doesn’t mean cabbage is unhealthy—it simply means nutritional needs vary from person to person. Paying attention to how your body responds, preparing it properly, and consulting a healthcare professional if you have medical concerns can help you enjoy it safely.