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Dairy is an Irritable Bowel Syndrome trigger even if you're not lactose intolerant. It's simply not just the lactose. It's also not just the high fat content of most dairy products that can cause your IBS to flare. Even skim and lactose-free dairy can trigger IBS attacks. In addition to fat and lactose, dairy contains components such as the proteins whey and casein, which can cause severe digestion problems. Though yogurt is traditionally recommended as an "easily digestible" dairy product because fermentation has reduced the lactose levels, even non-fat versions contain whey and casein, and should be avoided.

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