Yikes! That's not good news. Actually, I did a search here on HyperK and think I may have found my answer. Apparently, HyperK can be caused by eating a diet mainly comprised of fruit and vegetables (which is what I do). And here I thought I was living healthy! I wonder how vegetarians do it. I can see how this could be an issue for those with restrictive eating habits though.
From another board here:
"I love my fruits and salads. I eat at least seven times per day. I have no other vices. If I couldn't eat like that, because of increased potassium levels, it would literally kill me!"
"I also love fruits and vegetables. Unfortunately, too many of them have a high potassium content, and it all quickly adds up."