Effect of osmolality on hydration
Osmolality means, “how many particles/substances there are in a certain fluid or drink”. So, the osmolality defines the concentration (number of particles) of a drink. This is an important factor, since it influences the water absorption in the gut. A way to indicate the osmolality of a drink is to describe it as hypo-, iso- or hypertonic, you may have heard of these terms. Simply said, hypotonic means that the drink is less concentrated (has less particles) compared to our own body fluids. Therefore, such drinks are well absorbed (we like that!). Isotonic drinks have similar concentrations compared to our body fluids and are also well absorbed. In contrast, hypertonic drinks are more concentrated than our own body fluids and consequently are not absorbed well (we like this less, as you may understand). Thus, you can better avoid hypertonic drinks when rapid hydration is desired. It’s better to go for an isotonic drink, and hypotonic drinks seems to be even more effective (3,4)! .
Vifit Sport Protein Water has an osmolality of 210 – 240 mOsm/kg, which means that it is a hypotonic drink.