2. Must contain a mix of fast and slow carbohydrates
A solid isotonic sports drink contains four different carbohydrates. This is important to know as most sports drinks on the market only contain maltodextrin (slow energy) and fructose (fast energy) which only deliver a limited amount of energy.
The four carbohydrates to look for are maltodextrin + sucrose (for slow energy) and endextrose + fructose (for fast energy). This combination is very strong and ensures that you have a perfect isotonic thirst quencher.
The best isotonic sports drink will contain more than 30 grams of carbohydrates, spread over four different types for max energy absorption at the fastest possible rate.