I don't have a clue as far as that brand goes. My tablets are 250mg and I take three but started with one and worked up. The brand I use is Country Life though I don't know if it is any better than any other. There are a few different forms of magnesium. A friend of mine doesn't like the chelated form but uses another form of magnesium with good results. Soaking your feet in epsom salt might help, for example. Play around with it and see what works for you.