Moderate consumption of MSG generally does not cause significant harm to the body, but if consumed in excess over a long period of time it may have a variety of effects such as thirst, edema, and elevated blood pressure. 1. Thirst: MSG contains a certain amount of sodium, excessive consumption may cause thirst. 2. Edema: Excessive intake of sodium in MSG may burden the kidneys. Sodium needs to be eliminated from the body through the kidneys. Excessive intake of sodium may cause edema. 3. elevated blood pressure: for people who are themselves suffering from hypertensive disorders, MSG contains a lot of sodium, sodium elements can lead to water and sodium retention, if excessive consumption of MSG for a long period of time may cause an increase in blood pressure. MSG is a common condiment, but it is recommended to maintain a healthy cooking style with low salt and low MSG in daily life.