Cabbage is nutritious and safe for most people, so there aren’t four broad groups who must avoid it. However, some people may need to limit it or be cautious:
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People taking warfarin — cabbage contains vitamin K, which can affect warfarin. The key is keeping vitamin-K intake consistent rather than automatically avoiding cabbage.
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People with IBS or significant bloating — cabbage is a cruciferous vegetable and can cause gas, bloating, or abdominal discomfort in some people.
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People with a cabbage/cruciferous-vegetable allergy — they should avoid it if it reliably causes allergic symptoms.
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People with certain thyroid conditions who consume very large amounts of raw cruciferous vegetables — compounds in these vegetables can interfere with thyroid hormone production in some circumstances, particularly with iodine deficiency. Normal portions of cooked cabbage are generally not a concern.
For most people, cabbage is a healthy food and doesn’t need to be avoided.
