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Sulfur-containing foods (garlic, onions, leeks, broccoli, cauliflower, cabbage, asparagus, and Brussels sprouts), in addition to their high amounts of insoluble fiber, also produce significant gas in the GI tract and this can trigger attacks. As with all other fruits and veggies, however, these are extremely nutritious foods with significant health benefits, so they need to be treated with caution but definitely not eliminated from your diet.

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