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Lying down soon after eating makes it easier for stomach acid to travel back up, irritating the throat and triggering night cough. Meal timing, portion size and sleeping position have a measurable effect for many people.
More than 90% of the body's serotonin is produced in the gut, which is part of why digestion, mood and sleep are so tightly linked.
Evidence on diet and the microbiome is genuinely promising but still developing; results vary between people, and lifestyle steps work alongside — not instead of — medical care.
References
Mayer EA. Gut feelings: the emerging biology of gut—brain communication. Nature Reviews Neuroscience. 2011;12(8):453—466.
Cryan JF, et al. The Microbiota-Gut-Brain Axis. Physiological Reviews. 2019;99(4):1877—2013.
Yano JM, et al. Indigenous bacteria from the gut microbiota regulate host serotonin biosynthesis. Cell. 2015;161(2):264—276.
Frequently asked questions
How do I stop nighttime acid reflux naturally?
Finish eating about three hours before bed, keep dinners lighter, raise the head of the bed by 10-15 cm, and sleep on your left side. These positional and timing changes have a measurable effect for many people.
How can I avoid acidity at night?
Avoid large or late meals and common triggers such as alcohol, caffeine, and fatty or spicy foods in the evening, and don't lie flat soon after eating. Loosening tight waistbands and not snacking right before bed also help.
What stops acid reflux fast at night?
If reflux strikes in bed, sit or stand upright, sip water, and prop yourself up on a wedge or extra pillows so gravity keeps acid down. Don't stop any prescribed reflux medication without talking to your doctor.
When should I see a doctor about reflux?
Frequent reflux, trouble swallowing, vomiting blood or unexplained weight loss need medical review. The free self-check above can help you understand your triggers in the meantime.
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