Drinking soda in moderation is not harmful, and drinking large quantities of soda over a long period of time has side effects. The main side effects are: affecting the digestive function, calcium and phosphorus ratio imbalance, elevated blood pressure and so on. 1. Affecting digestive function: Soda water is an alkaline liquid. Long-term consumption will neutralize the acidic liquid in the stomach, leading to a lack of stomach acid, affecting the digestive function, so that the food in the stomach lacks gastric acid decomposition, resulting in poor digestion of food, is not conducive to the absorption of nutrients, and is harmful to health. 2. Calcium-phosphorus imbalance: soda contains more phosphorus, long-term drinking will lead to calcium-phosphorus imbalance in the body, thus affecting the body’s absorption of calcium, which may lead to calcium deficiency. 3. elevated blood pressure: soda water in the sodium ion content is high, long-term drinking will lead to excessive intake of sodium, and sodium is one of the causes of elevated blood pressure. Soda can be consumed in moderation, but do not drink large quantities for a long time, so as not to adversely affect your health.