I'm still spasm free after 3 l/2 weeks off calcium. I am eating some dairy, however, such as low fat cottage cheese. My lab test showed I was in normal calcium range, will have another test next week. What a surprise. I am now wondering about the long term affect of not taking calcium, on bones. I surely do not eat a lot of calcium, just a little dairy. I don't have any green leafy veggies because I have Porphyria, and they are too high in sulfur for me to eat. After taking calcium for years, this is a surprise. The magnesium need is still paramount.
Of course I'm talking about specific spasm, the ones in low back and legs which I have had at night. I expect I can still get other spasm, like the eye spasm I get in smoke.

After more than a month without calcium supplements, my severe leg and lower back spasm and jerk came back at night, with an added problem: a Charlie Horse that lasted for an hour and a half. The pain of the Charlie Horse was not too bad because my leg and foot are numb anyway, but it was surely miserable to not be able to straighten my ankle out by any form of moving. I was locked into a spasm!

So I decided the no calcium regime was not for me, in spite of tests showing (on the second test) that I was in the middle of normal range on blood calcium. I took two calcium right away (half my former daily dose) and soon the spasm was gone.

I am now taking half the former dose (500 mg is what I am now taking) or, if I have NO dairy during the day, 750 mg. I will see the pcp tomorrow and we can discuss this.
I think tests do not always show what is going on--not the first time that has happened. But the concept of taking less is worthwhile, perhaps, because they said that too much calcium can impair the arteries and valves.