Is there a electrolyte powder you can take when trying to do a prolonged fast? Like a 3-7 day fast?
Everything I try to find on Amazon ties into "Keto" and no real mention of just wanting to replenish electrolytes without risking breaking a fast...
Is it as simple as if these packets or pills have no calories or fats it wont break a fast?
50 hours is my longest fast thus far but I want to eventually work my way up to a 7 fast at some point.
It depends on what constitutes "breaking a fast" for you. Some people would say honey or a simple piece of fruit would be breaking it, others are more lenient. I'm keen to try some extended fasts soon but haven't started planning/prepping yet, this gives me a chance to do it.
I've heard some people do watermelon fasts or apple fasts too, which eases the burden but still brings the overall benefits of fasting, although everyone is different. Personally I would prefer just a water fast and to ride it out as long as i could, having an electrolyte drink on-hand, as you propose, in case it's sorely needed during weaker moments.
It's probably better to do a water-only fast intermittently and steadily increase from 1 day, to 2 days, 3 days, 5 days, 7 days etc. increasing resilience, rather than rely too much on an Electrolyte drink to get you through it each time. But everyone's different, i'm just riffing on some options here.
I found these links for DIY Electrolyte drinks:
Give your body a nourishing homemade electrolyte water to help it balance out and recover after intense exercise. This elixir contains both salt and a little sugar, which will promote rehydration. It tastes great and is all-natural unlike...
Need a pick-me-up? Then mix up this salty elixir. With luscious lemon for potassium and flavor, plus magnesium and salt, it restores your electrolytes, gives you a lift, and helps keep headaches and muscle cramps at bay.
I like the last one, which includes a Magnesium supplement in the recipe, although this would be more suitable if you were doing quite physical activities on the fast, as i suppose generally this applies to post-workout scenario, but to be fair we're all probably falling short on magnesium these days anyway and it would aid you during a fast.