I take 500mg of the Nature Made. It's cheap at Wal-mart. You might want to do a little research and see what might be best for you.

I do know that I've run out before and my leg spasms and all over muscle pain/cramps/tingles get bad.

Also, activity level and stress play a big role in pain management. I walk a fine line between not doing enough and over-doing it. I've had to learn to "let things go". I find myself asking myself.... "Will this matter in 10 years/months/weeks/days/hours?" If the answer is no, I let it go. (or try to)