You are sourcing your claim with the website of a company trying to sell people a supplement. You literally reply to a post basically saying: "Hey, here is thing that you falsely believe because of advertisement that has kinda brainwashed you" by pointing at another advertisement and going: "But the ad says this is right!" An ad by company mind you that currently has a class action lawsuit hanging against them because of false advertisements.
It is simply not true. Humans who are not excessively exercising in the heat and are otherwise healthy are not in danger of electrolyte related health issues. Because most modern humans already take in more electrolytes than basically any generation of humans before... well, at least before the World Wars. Sodium, Chlorid, and Potassium are in a lot of foods we are already taking in in high amounts. People with very restrictive diets rarely might experience a lack of Potassium, but even that is rare.
The people experience electrolyte related health emergencies are generally people who work out too much, or have another underlying health issue that relates to how their body absorbs electrolytes or can hang onto them. Or they are losing electrolytes due to health reasons (vomiting, diarrhea, but in some cases a really bad flu can do it too).
The people outside of these specific circumstances that run into problems, have one of two causes for this:
a. They are food insecure and due to this experience malnourishment (this is why in the US we actually see most cases of hyponatremia without underlying heallth issues in food deserts).
b. They have drunken too much liquid.
The second one is a big blind spot for many - and especially in the context of exercise is happening more than traditional electrolyte loss. People have (largely due to advertisements by beverage companies throughout the 70s, 80s, and 90s) internalized that they should drink a truly absurd amount of water, and that you should - to quote one gatorade ad - "drink before you even get thirsty". Which is not the actual medical advice. So what happens is that people do drink a lot. Which normally would not be a problem, because our body is technically quite good at just getting rid of too much liquid. But if you are in a situation in which your body is trying to preserve liquid (which happens when you work out, but also in extreme heat) it will hold onto the liquid you add, which obviously thins out liquids already in the body, and hence can create electrolyte imbalances. Especially hyponatremia, as natrium levels are very prone to unbalanced due to overhydration. In fact one of the biggest studies on this found that even athletes more commonly ran into problems due to drinking too much sports drinks, rather than too little.
And again, this is basic critical thinking: if our body was so bad at retaining those things, the entire homo sapiens thing would never have become big. We would have just died out after like three generations. Because not only did humans prior to the 1960s not have sports drinks, the usually were accessing less electrolytes in their normal diets.
The reason you, and many others, believe that this is a big problem is because companies realized that they can make a lot of money by fearmongering you about this. And mind you: we have the data for this. We know how gatorade paid of sports magazines, and studies on this, to make sure people believe that they absolutely have to drink gatorade to survive the heat. Because, you know, gatorade realized they could make more money like this.
Sports drinks were developed for just that: sports. They were developed to explicitly help someone who is actively working out to get the nutrients. And yes, if you are working out, adding potassium and magnesium is a somewhat good idea, because those are used up by your body during your workout. And originally that was all gatorade was there for. And then they realized that there was money to be made if they gaslighted everyone into thinking they needed gatorade. And mind you: this is stuff we have documentation on.
But otherwise: if you are healthy and eating somewhat normally you will be fine.
The entire supplement market is an unregulated wild west. Those people are not interested in your health, just in their bottom line. They will sell you rat poison while telling you it is healthy if they think they can make a quick buck from it.
You do not need, and should not take, supplements, unless they were prescribed to you by a doctor and came from a place where you actually know what is inside of those tablets or drops or whatever. This goes especially true if you are in the US, where the regulatory standards for supplements are insanely low, meaning that you often do not get what is actually said on the package. In both directions. You might take a supplement and do not even get half of what the description says. Or you get double the amount. Which also is not good for you.
Oh, and also: the people who are food insecure, who are mainly the one healthy group in danger of electrolyte imbalances, should not spend money on overpriced sports drinks, and will generally be better off by just trying to get as balanced of a meal as possible.
