Whited - be very careful about taking supplemental calcium. It can accumulate in places where you don't want it, like the arteries. There is a lot of recent information about this: https://www.healthunits.com/news/ca...-heart-disease/ is one source.

Magnesium is extremely important for many reasons: https://ods.od.nih.gov/factsheets/M...thProfessional/ I take a Chelated Magnesium (glycinate/lysinate chelate) supplement (Doctor's Best) of two pills in the morning and two about an hour or two before bedtime every day. This gives me 400mg of supplemental magnesium a day. For me, and always YMMV, it's eliminated muscle cramps during workouts and sleep. However, magnesium does far more than that as it works well with vitamin D and calcium for transport. Based on current information, I eliminated all calcium supplements, as I get plenty from the food I eat. As for RLS or PMLS, hope you find a solution. Magnesium may help, but most don't consume enough.