Does milk help heartburn during pregnancy?

What does the evidence say about milk for heartburn during pregnancy?

1. In a systematic review of dietary and lifestyle factors, a high-fat diet was positively correlated with gastroesophageal reflux disease at an odds ratio of 7.568 (95% CI 4.557 to 8.908), while findings on milk consumption were mixed across studies. 1
2. The same review found eating beyond fullness positively associated with reflux at an odds ratio of 2.85 (95% CI 2.18 to 3.73), and an interval of less than three hours between dinner and bedtime at an odds ratio of 7.45 (95% CI 3.38 to 16.4). 1
3. Heartburn affects a reported 17 to 80 percent of pregnancies worldwide and can occur in any trimester, driven by progesterone relaxing the lower oesophageal sphincter, the enlarging uterus raising intra-abdominal pressure, and abnormal gastric emptying or delayed small bowel transit. 2
4. Standard advice for reflux includes elevating your head and upper back 6 to 8 inches for sleep, quitting smoking, changing eating habits and diet, and using antacids for mild symptoms only, not daily or for severe symptoms without talking to a doctor. 3
5. If it is buffering you want, calcium carbonate is the studied version of that idea: 1,000 mg of calcium carbonate equals 400 mg of elemental calcium, adult heartburn dosing runs 500 mg to 1,000 mg, and it is considered acceptable for reflux during pregnancy though high doses can cause milk-alkali syndrome. 4

Is milk for heartburn safe in each trimester?

• First trimester. Reflux is not usually the headline this early, but milk often is: it is a common nausea food and a calcium source at once. If a glass settles your stomach in the first trimester, that is a fine reason to drink it. Just do not expect it to double as acid control later.
• Second trimester. As progesterone keeps the lower oesophageal sphincter relaxed, the fat question starts to matter. The same review that found a high-fat diet strongly associated with reflux also found soft drinks positively related and eating beyond fullness linked at an odds ratio of 2.85.
• Third trimester. Late-pregnancy reflux is mostly mechanical, and a warm glass before bed can work against you twice: fat, and timing. Leaving less than three hours between dinner and bedtime was associated with reflux at an odds ratio of 7.45, and a bedtime drink extends dinner.