Thanks for the info, geckogirl and Shirley!
I always thought you had to take magnesium with a meal, but it would sure make sense to take it closer to bedtime. I should try that. I had been taking it at breakfast, and then again at suppertime.
Shirley, if you have the apple cider vinegar recipe handy, I would sure appreciate it. But if it's packed away like my recipes are, don't worry about trying to find it. Thank you.