Quick question about electrolytes during fasting

Somewhat of an intermediate faster here. I usually rotate between 16/8 and 18/16 … my body can really only handle up to 18 at this point in time. Do you guys and gals recommend adding an electrolytes to water to get rid of any possible headaches or hunger that arises after a certain point? Obviously I’m not using ones that have more than 15 cal. Just curious if it’s if it helps anybody out, especially staying hydrated.