it sucks that the overwhelming majority of medical messaging around salt/sodium is "evil poisonous substance that you're definitely already eating way too much of," because like. you do still need it. (trust me, as a POTS-haver, I've had to completely rewire my own brain about salt.) and you need more salt when the entire northern hemisphere is hot enough to fry an egg on. ever tried sucking down the recommended 64oz of hydration per day entirely as water, only to find you're peeing constantly without any of the purported benefits of being "hydrated"? assuming you don't have another medical condition that causes frequent urination, your body probably needed more salt/electrolytes to be able to hold onto that water and make use of it. if there was ever a time to keep a sports drink/pedialyte/etc within constant reach, it's when the heat index is 110°F/43°C.