Why is skim milk generally preferred over whole milk when seeking temporary relief from acid reflux?
Answer
Higher-fat dairy delays stomach emptying, increasing reflux time
The preference for skim milk over whole milk stems directly from the fat content and its impact on gastric residence time. High-fat dairy products, such as whole milk, significantly slow down the process of stomach emptying. When food and liquid stay in the stomach longer, the stomach contents—including acid—remain in contact with the lower esophageal sphincter (LES) for an extended duration. This prolonged exposure increases the likelihood that the LES will relax inappropriately, thus leading to an increased incidence of heartburn or reflux symptoms.
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