Khaberni - Coffee is one of the most popular drinks in the world, due to its benefits in increasing alertness, improving brain functions, and enhancing sports performance. While many can drink coffee on an empty stomach without problems, some may suffer from side effects ranging from digestive disorders to hormonal changes.
1. Increased stomach acidity and the risk of heartburn
Coffee is an acidic beverage, and drinking it on an empty stomach may stimulate more acid production in the stomach, which can irritate the stomach lining and cause heartburn or acid reflux, especially in people with a history of gastroesophageal reflux disease (GERD) or irritable bowel syndrome (IBS). Caffeine also relaxes the lower esophageal sphincter, which can increase reflux. It is advisable to eat a light meal before coffee or choose dark roasted coffee to reduce acidity.
2. Faster absorption of caffeine
Drinking coffee on an empty stomach may increase the rate of caffeine absorption, which increases the risk of tension, trembling, accelerated heart rate, headaches, and increased anxiety. It is recommended to limit caffeine intake to 400 mg per day, equivalent to four to five cups. Pregnant women are advised to stick to one to two cups per day, as caffeine crosses the placenta.
3. Digestive problems
Drinking coffee on an empty stomach may cause bloating, cramps, nausea, diarrhea, and an increase in bowel movements. People with irritable bowel syndrome are more susceptible to these symptoms. Eating light food before coffee can reduce these issues.
4. Hormonal changes
Caffeine stimulates the secretion of the cortisol hormone, known as the stress hormone, which regulates metabolism and blood pressure. An increase in cortisol may lead to increased stress and sleep disorders, and over time may contribute to heart disease and bone loss. However, the increase in cortisol caused by coffee is usually minor and is not associated with long-term health risks.
In conclusion, despite the health benefits of coffee, drinking it on an empty stomach can lead to digestive disturbances, hormonal changes, and strong caffeine effects. Be sure to eat a light meal before coffee to minimize these risks.



