i'm doing both... it's led me to adding potato back to my diet (it's very high in K) and bananas, also very high, as well as actually having a substantial amount of potassium chloride that i add to drinks and yogurt and put on other foods i eat as well, and the magnesium unfortunately it's not the best, carbonate, hydroxide and citrate, but it is definitely working
i think it takes time for the tissue to regenerate and absorb the stuff into it as well, almost a week after i started on the potassium i started to really feel noticable relief from the cramping, i suspect that it takes 1-3 months to fully recover normal distribution of these minerals, according to stuff i've read about potassium deficiency
i shoud also add that in my case it's related to my kidneys and i have to be careful about diuretics, been exploring different options to cut back on that, pretty much i have to restrict my caffeine and alcohol intake, i feel much better when i do, and when i go too far i feel pretty bad for days, it's got to this point