Many people love spicy food—it is exciting, flavourful, and a great way to relieve stress. Sichuan hot pot, Korean spicy noodles, boiled fish in chili oil, and sour and spicy noodles are year-round favourites in Hong Kong. If you are a spicy food lover, you have likely experienced discomfort such as heartburn or stomach pain after a spicy meal. This naturally leads to the question:
"Is spicy food actually harmful to your stomach?"
Let’s take a scientific approach to debunk this common stomach health myth.
Why Does Spicy Food Cause Stomach Discomfort?
1. A "False" Burning Sensation
Our bodies contain a sensory nerve receptor called TRPV1, which acts as an alarm system for detecting high temperatures and pain. When we eat spicy food, capsaicin—the active compound in chili peppers—binds to TRPV1 receptors in the mouth and stomach lining1. This triggers nerve signals that send a "heat" or "pain" message to the brain, making us feel a burning or stinging sensation in our stomach.
However, it is important to note that this burning sensation is different from true heartburn caused by excess stomach acid, medications, or underlying medical conditions. It is merely a temporary "false burning sensation."
Additionally, this sensation stimulates the brain to release endorphins. Endorphins are natural painkillers that also induce feelings of pleasure. That is why many people find enjoying spicy dishes increasingly satisfying, eventually forming a habit of craving spice with every meal.
2. Capsaicin Doesn't Actually Harm the Stomach
In the past, it was widely believed that chili peppers and spicy foods stimulated stomach acid secretion and that eating too much led to stomach damage. Consequently, individuals with severe stomach issues were advised to avoid spicy food altogether.
However, recent studies have revealed that capsaicin does not stimulate acid production or harm the stomach; in fact, it is a beneficial substance. Rather than stimulating stomach acid, capsaicin actually inhibits acid secretion, promotes alkali and mucus production, and significantly increases blood flow to the stomach lining2—all of which help prevent discomfort and support healing.
That said, for individuals whose stomach lining is already damaged, high concentrations of capsaicin can irritate sensitive stomach nerves, triggering or worsening burning and pain. Therefore, moderation is still key!
3. The Double Impact of High-Fat Foods and Iced Drinks
Spicy dishes often share a common characteristic: they are high in oil and fat. Sichuan hot pot, boiled fish in chili oil, hot and sour noodles, and spicy fried chicken are no exception. These massive amounts of oil and fat are the true culprits behind real stomach discomfort.
High-fat foods are incredibly difficult to digest and remain in the stomach for an extended period, forcing the stomach to continuously secrete large amounts of acid for digestion. Not only does this drastically increase internal stomach pressure, but the fat also directly causes the lower esophageal sphincter (the valve between your stomach and esophagus) to relax.
Under the triple threat of excess acid, high stomach pressure, and a weakened defense line, stomach acid can easily flow back up, triggering "true" acid reflux and heartburn.
Furthermore, people often pair spicy meals with iced drinks to cool down the heat. In fact, capsaicin is fat-soluble, not water-soluble. Iced drinks do not wash the spice away; they merely spread it further. Moreover, rapidly drinking large volumes of iced drinks causes the stomach to expand suddenly, increasing internal pressure and mechanically pushing stomach acid upward, which easily leads to stomach pain and acid reflux3.
In short, stomach discomfort after a spicy feast is rarely caused by capsaicin alone, but rather by the combined impact of the entire meal.
How to Enjoy Spicy Food Wisely Without Harming Your Stomach
1. Control Spiciness and Know Your Limits
If you are prone to heartburn or stomach pain, pay close attention to your body's signals. Avoid spicy food if you are already experiencing indigestion or bloating. If you are unfamiliar with a restaurant's spice levels, start with a mild option or a smaller portion.
You can also rinse spicy food in plain water before eating to reduce the heat. If you begin to feel uncomfortable during the meal, stop eating immediately.
2. Never Eat Spicy Food on an Empty Stomach
Balance your choices when having spicy meals. For instance, when indulging in Sichuan hot pot or hot and sour noodles, include lighter side dishes, such as leafy vegetables and tofu.
Additionally, try to avoid drinking the spicy broth, as it usually contains large amounts of oil. Drinking too much oil significantly increases the digestive burden on your stomach, easily triggering various discomforts.
Pro Tip: If the high oil content and rich ingredients in your spicy meal or hot pot trigger true heartburn, acid reflux, or stomach pain, pause eating. You may take an antacid to neutralize the excess stomach acid and help relieve the discomfort.
Weisen-U is a dry-coated tablet consisting of an inner core and an outer layer:
The strong antacid in the outer layer dissolves quickly after intake and neutralizes excessive gastric acid, relieving stomach pain.
Afterwards, the Methylmethionine Sulfonium Chloride (Vitamin U) contained in the inner layer penetrates the damaged sections of the stomach, quickly treating the affected areas, and promoting the recovery of the gastric mucosa.
Protecting Hong Kong's stomachs for over 65 years and reigning as the No. 1 selling antacid for 12 consecutive years, Weisen-U is the best choice you can depend on.
Available across Hong Kong—check our store locator.
Follow us on Facebook and Instagram for wellness tips or subscribe to our email newsletter.
Enjoying delicious food is one of life's greatest pleasures, and good health is the strong foundation that allows you to truly savor it. The next time you sit down to a vibrant, mouth-watering, and aromatic spicy dish, take a moment to assess your stomach's 'current condition.' By knowing your limits and practicing moderation, you can naturally find the perfect balance between the fiery temptation of spice and your digestive comfort.
Disclaimer:
This article is for informational purposes only and is not a substitute for professional medical advice. Stomach pain can have many causes, some of which may be serious. Always consult a healthcare provider for diagnosis and treatment, especially if symptoms persist or worsen. The distinctions here are general guidelines based on common patterns and should not be used for self-diagnosis.
References:
1 Horie, S., Tashima, K., & Matsumoto, K. (2018a). Gastrointestinal spice sensors and their functions. YAKUGAKU ZASSHI, 138(8), 1003–1009. https://doi.org/10.1248/yakushi.17-00048-1
2 Satyanarayana MN. Capsaicin and gastric ulcers. Crit Rev Food Sci Nutr. 2006;46(4):275-328. doi: 10.1080/1040-830491379236. PMID: 16621751 https://www.tandfonline.com/doi/abs/10.1080/1040-830491379236
3 Villanova, N., Azpiroz, F., & Malagelada, J. (1997). Perception and gut reflexes induced by stimulation of gastrointestinal thermoreceptors in humans. The Journal of Physiology, 502(1), 215–222. doi: 10.1111/j.1469-7793.1997.215bl.x. https://pmc.ncbi.nlm.nih.gov/articles/PMC1159583/
