Sodium ions help control blood flow, blood volume, osmotic balance, and pH.
For example, people who have anorexia severely reduce their food intake to lose weight. People who have bulimia eat an excessive amount of food in a short period of time, then purge or use other methods to prevent weight gain.
Food labels provide the amount of calories and what the food contains
Maybe it was influential, maybe it was peer pressure, maybe it was the need to fit in... there are multiple reason of why teens would want to do drugs or may be at a greater risk of doing drugs.