I have an embarrassing confession. I sweat. A lot. Probably 3 or 4 times as much as the average person. I'm not entirely sure of the cause, but it means that I am constantly losing large amounts of both fluids and salts, as much as an athlete would, even when I'm not doing anything particularly physically exertive. In addition to that, I have dysautonomia, specifically Postural Orthostatic Tachycardia Syndrome, something that is usually comorbid with Ehlers Danlos Syndrome (EDS), which I also have. This means that my body doesn't know how to regulate blood flow, which causes a large variety of different symptoms, but it is most pronounced when changing positions (that's what postural orthostatic tachycardia means- heart rate affected by your posture) which can cause really bad dizziness.
To treat the symptoms of POTS, there are lots of different recommendations. Drinking really large quantities and having a lot of salt are two extremely helpful ones, because salt causes water retention, and combined with drinking more, that increases your blood volume, which is one of the biggest ways to help symptoms.
I don't know about you, but drinking salt water isn't something that is particularly appealing to me. I've drunk large amounts of water in the past but it made me nauseous. I've even gotten water poisoning one time after a hike (it was terrible) and it only went away when I had something carby and salty. I try to remember to drink but when it is just water it doesn't happen enough. And it doesn't really help my symptoms anyhow, because if you drink water but don't have the salt, you just pee it all out and it doesn't help with the blood volume.
Enter sports drinks.
They're basically drinks that are meant to help replenish what you lose when you sweat. Liquid. Salt. Electrolytes. And sugar. Not always sugar. But sugar helps because carbohydrates help facilitate sodium and water absorption. My friend started buying powdered Gatorade and I started drinking it to see if it helped with my dizziness and exhaustion issues and the difference was remarkable. I was much more of a functional human being when I drank Gatorade. However, locally you can only buy ready made Gatorade, which is quite pricey if you drink 3-4 liters a day. I ordered it online internationally, and it was terrific. But then the store raised their shipping prices prohibitively, and ordering it didn't make sense anymore. I tried ordering rehydration packs from iherb (not Gatorade but a similar idea) but they still haven't arrived. But my Gatorade was finished. And I needed to have something to help me rehydrate that wasn't just water.
I have a sports drink recipe here, called Laborade (which I based on a different recipe I found online years ago) but it calls for a gallon of water, which is a lot to make at once, and I don't really have any good container to mix that large of an amount in. And I wanted something I could make to scale. So I experimented to see if I could make that into a powder version, using citric acid, and some fruity tea bags... and it was just terrible. It tasted so bad that I didn't want to drink it, nor did anyone else. This was after multiple attempts with different permutations.
But I was out of Gatorade and I needed something. So I experimented. What if I made lemonade, but didn't make it as strong, and then added some salt to that? It worked. Then I added tea bags for flavorings. It also worked great. I tried playing around with the amounts of sugar, salt, and lemon... but increasing the salt just made it taste yucky.
Eventually, I found the perfect ratio for me. And it works just as well as Gatorade, I think. I mean it's not like I did a scientific study with this, but drinking 4 liters a day of this sports drink definitely helps a lot, and much more than that amount of water, and it is more pleasant to drink so I don't minimize my drinking.