However, what many people don’t realize is that eating cabbage the wrong way or in excessive amounts may cause health issues for certain individuals.

Overconsumption or improper use of cabbage can aggravate acid reflux, increase the risk of recurring kidney stones, interfere with iodine absorption in people with hypothyroidism, or reduce the effectiveness of anticoagulant medications.

Who Should Be Careful When Eating Cabbage?

1. People Taking Anticoagulant Medication (Warfarin)

Cabbage contains high levels of vitamin K, which plays a role in blood clotting. Consuming large or inconsistent amounts of cabbage may reduce the effectiveness of Warfarin.

Recommendation: There’s no need to completely eliminate cabbage, but intake should remain consistent from week to week so doctors can properly adjust medication dosage if needed.

2. People With a History of Calcium-Oxalate Kidney Stones

Cabbage contains oxalates, compounds that can bind with calcium in the urine and contribute to stone formation.

Recommendation: Avoid eating cabbage too frequently and drink plenty of water to help dilute oxalate levels in the body.

3. People With Hypothyroidism or Receiving Thyroid Treatment

As a member of the Brassicaceae family, cabbage contains goitrogens, substances that can interfere with iodine absorption when eaten raw or in excessive amounts.

Recommendation: Cook cabbage thoroughly and avoid eating it raw.
Do not consume large amounts daily, and avoid eating cabbage close to the time you take levothyroxine or other thyroid medications.

4. People With Bloating or Irritable Bowel Syndrome (IBS)

Cabbage is high in FODMAPs, which ferment easily in the gut and produce gas. This can lead to bloating, abdominal discomfort, excessive flatulence, and worsening IBS symptoms.

Recommendation: Limit portion sizes and choose well-cooked cabbage over raw or pickled versions.

How Much Cabbage Is Enough?

For healthy individuals, eating cabbage about three to four times per week is generally reasonable.

To improve digestion and reduce gas:

  • Opt for boiling, steaming, or lightly stir-frying rather than eating it raw.
  • Pair cabbage with ginger or garlic to help minimize bloating.
  • Avoid consuming large amounts of raw cabbage, especially on an empty stomach or late in the evening.