Namely, drinking coffee on an empty stomach can have a series of effects that we often overlook. One of the main reasons is how coffee affects the stomach. Caffeine stimulates the secretion of gastric acid, and when there is no food in the stomach, this acid can irritate its lining. In more sensitive individuals, this can lead to discomfort, a burning sensation, or even symptoms related to gastritis. Although it does not occur in everyone, this problem is more common than we think. Additionally, coffee also affects stress hormones. In the morning hours, the body naturally produces more cortisol—the hormone that wakes us up. Adding caffeine on an empty stomach can further enhance this effect, causing nervousness, a rapid heartbeat, and a feeling of inner tension in some people. Instead of energy, the result may be the opposite—discomfort and restlessness. Another often overlooked aspect is the impact on blood sugar levels. When coffee is consumed without food, it can lead to sudden fluctuations in glucose, which later manifests as a drop in energy, fatigue, or an increased craving for sweets. That is why it is not uncommon to quickly desire another coffee after the first one. Although coffee is often considered an ally for concentration, on an empty stomach its effect can be short-lived. The initial burst of energy is quickly lost, leaving a feeling of exhaustion and a lack of focus by mid-morning. The good news is that you do not have to give up this beloved beverage. It is enough to make a small change in your routine. Experts advise starting your day with a glass of water, followed by something light to eat—such as fruit, yogurt, or oatmeal. Only after that can coffee have its full, positive effect. In the end, the problem is not with coffee, but with how we consume it. Small habits often make the biggest difference, and this is one of those you can change as early as tomorrow morning.