I suggest that you take magnesium and calcium separately. One article I read mentions that the traditional 2:1 ratio of calcium to magnesium supplementation is to high, and a one to one ratio makes more sense. Besides which, calcium and magnesium compete for absorption, so taking them at different meals seems to make sense. Most people are much more deficient in magnesium than calcium. Those who eat plenty of dairy products might not even need any supplemental calcium.

Zinc citrate is probably okay, but it seems like the most enthusiasm is for zinc picolinate. 25-30 mg a day seems like a reasonable dosage to supplement at. Too much zinc can interfere with the absorption of copper and iron, so it is not a good idea to overdo it. If someone takes zinc, copper, and iron, it is probably best to take each at a separate meal.

I have the Now magnesium citrate powder. I use it mostly when I am feeling very sick and need to load up on vitamin c. I find it easier to swallow tablets normally on a day to day basis than to measure and mix powder. I also don't like the taste of magnesium ascorbate. Besides which, my vitamin c tablets have bioflavonoids. I guess I should look for magnesium citrate tablets or capsules. My vitamin c tablets are with calcium. Having it with magnesium would be better(I still want the bioflavonoids though).