5,000 Calories of the food drinks listed provide between 0 and 7,400 mg of sodium. If you use a drink with a low sodium content, be sure to use other means to meet your sodium needs. Another important point to remember is that, although liquid, these drinks should be thought of primarily as foods. In other words, they aren't a substitute for water. Keep one bottle filled with water, or use a hydration system.
Personal experimentation is absolutely essential.
In 1998 on the Pacific Crest Tour five experienced ultra riders experimented with different food drinks to provide a subjective evaluation for readers of UltraCycling . Seven drinks were tested. Each drink was mixed so that a 24 oz. Total Percent From Sodium Calories Protein Carbs Fat Mg. This was not a controlled test where we tried to measure differences in performance and correlate those with the drinks.