Talk of the town:What is sodium?

【明報專訊】Do you consume instant noodles for breakfast? Or are you a big fan of instant noodles? Recent tests done by the Consumer Council on 19 different instant noodle samples from the market showed that eating the noodles and the soup together exceeds the recommended amount of sodium that adults should consume in a day. What is sodium? How much of it should we consume in a day?