Heartburn has a reputation as a big-dinner problem, the price of pizza at 10pm. But research in women points to other factors that often shift in midlife: body weight, estrogen and the rhythm of your evenings.
If you've started reaching for antacids more often in your late forties or fifties, here's what the evidence says about why, and what's worth changing.
What heartburn is
Heartburn is the burning feeling behind your breastbone when stomach contents, including acid, flow back up into the esophagus. Some people notice a sour taste or food coming back up instead. When it happens often or causes damage, doctors call it gastroesophageal reflux disease, or GERD. It remains among the most common conditions seen by gastroenterologists and primary care doctors (Katz et al., 2022).
Weight matters, even in the "normal" range
The Nurses' Health Study asked 10,545 women about reflux. About 22% had symptoms at least once a week. The higher a woman's body mass index (BMI), the more likely she was to have frequent symptoms, in a steady, step-by-step pattern. Compared with women with a BMI of 20 to 22.4, women with a BMI of 25 to 27.4 had about twice the odds of frequent symptoms (Jacobson et al., 2006).
The most useful finding was about change. Among women who started at a normal weight, those whose BMI rose by more than 3.5 points had 2.8 times the odds of frequent reflux compared with women whose weight stayed stable. For a woman who is 5 feet 5 inches tall, that's a gain of about 21 pounds.
A Norwegian survey of more than 65,000 adults also found that the link between BMI and reflux was stronger in women than in men. And a drop in BMI was associated with a lower risk of reflux symptoms (Nilsson et al., 2003). Since weight and shape often change around menopause, this is one reason heartburn can appear at the same time.
Estrogen seems to play a part
The Norwegian study found something else. The link between weight and reflux was stronger in premenopausal women than in postmenopausal women, and hormone therapy made it stronger. The researchers suggested that estrogen may play an important role in reflux (Nilsson et al., 2003).
A later analysis of 51,637 postmenopausal women in the Nurses' Health Study looked at hormone use directly. Compared with women who had never used postmenopausal hormones, reflux symptoms were more likely in current users of estrogen alone (odds ratio 1.66), current users of estrogen plus progesterone (1.41) and past users (1.46). The risk rose with higher estrogen doses and longer use. Women using selective estrogen receptor modulators or over-the-counter hormone preparations also had higher odds (Jacobson et al., 2008).
These were observational studies, so they show an association, not proof that hormones cause reflux. They also don't mean hormone therapy is the wrong choice for you. They do mean that new heartburn after starting hormones is worth mentioning to your prescriber rather than quietly putting up with.
The gap between dinner and bed
Timing may matter as much as the menu. In a study from Japan, 147 people with GERD were compared with 294 people of the same age and sex without reflux. After accounting for smoking, drinking and BMI, people who went to bed less than three hours after finishing dinner had 7.45 times the odds of GERD compared with those who waited four hours or more (Fujiwara et al., 2005).
A study like this can't prove that late dinners cause reflux, since people with reflux may differ in other ways. But moving dinner earlier, or keeping a late meal small, is an easy, low-risk experiment.
What you can try
Leave three or more hours between dinner and bed on most nights for two weeks, and note whether nighttime symptoms change.
Notice gradual weight change. Not for appearance's sake, but because even moderate gains have been linked to more frequent symptoms.
Keep a simple log of heartburn episodes, meal times and, if relevant, when you started or changed hormone therapy.
Talk to your prescriber if heartburn began or got worse after starting hormones. Don't stop a prescribed medication on your own.
Ask about treatment if it keeps coming back. The American College of Gastroenterology's guideline covers lifestyle changes alongside medication. Proton pump inhibitors remain the main medical treatment, and the guideline also addresses concerns about long-term use (Katz et al., 2022).
When heartburn needs a doctor
Trouble swallowing, pain when swallowing, or food that feels stuck
Persistent vomiting, or vomit that contains blood
Black stools, anemia or weight loss you can't explain
Heartburn that keeps returning despite over-the-counter treatment
Chest pain you're unsure about. Heart problems can feel like heartburn, so get emergency care if pain comes with shortness of breath, sweating, nausea, or pain spreading to your arm, jaw or back.
Sources
Katz PO, Dunbar KB, Schnoll-Sussman FH, Greer KB, Yadlapati R, Spechler SJ. ACG clinical guideline for the diagnosis and management of gastroesophageal reflux disease. Am J Gastroenterol. 2022;117(1):27-56. PMID 34807007
Jacobson BC, Somers SC, Fuchs CS, Kelly CP, Camargo CA Jr. Body-mass index and symptoms of gastroesophageal reflux in women. N Engl J Med. 2006;354(22):2340-8. PMID 16738270
Nilsson M, Johnsen R, Ye W, Hveem K, Lagergren J. Obesity and estrogen as risk factors for gastroesophageal reflux symptoms. JAMA. 2003;290(1):66-72. PMID 12837713
Jacobson BC, Moy B, Colditz GA, Fuchs CS. Postmenopausal hormone use and symptoms of gastroesophageal reflux. Arch Intern Med. 2008;168(16):1798-804. PMID 18779468
Fujiwara Y, Machida A, Watanabe Y, et al. Association between dinner-to-bed time and gastro-esophageal reflux disease. Am J Gastroenterol. 2005;100(12):2633-6. PMID 16393212
This article is for general information and isn't medical advice. Talk to your healthcare provider about frequent heartburn, and never stop or change a prescribed hormone therapy without their guidance.
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