I tend to question any product that claims "natural" on the label. When a product is marketed as "natural", it usually isn't and this can be checked by reading the ingredient label.
A better alternative to Gatorade might be something as simple as a little bit of organic orange juice* or palm/coconut sugar with a small pinch of Celtic sea salt mixed in for the really natural sugars and salts that Gatorade has prided itself on providing to athletes. Celtic sea salt contains many trace minerals that serve important regulatory and nutritional functions. It helps to reduce inflammation, balance blood sugar, restore energy, clear the lungs of mucus and phlegm, helps prevent muscle cramps, helps to extract excess acidity from the cells, is a natural antihistamine, and is needed to make the structure of the bones firm. A low sodium diet is just as unhealthy as an outrageously high sodium diet or a diet that includes the use of typical table salt.
Typical table salt often contains aluminum-based anti-caking agents and other additives that are linked to high blood pressure, kidney problems, and water retention. THIS is the type of salt to stay away from.
* Choice of juice is individual and can be diluted. If the acidity of the juice is irritating in any way (especially mid-endurance event), I recommend using plain sugar such as unrefined palm/coconut sugar instead of juice.