I recently bought 225g (e.g. many many days worth) of buffered vitamin c powder in the form of calcium ascorbate. The reason I wanted a buffered form is because previously i tried the acid-y powder but it made me very very bloated. I am not taking tonnes - aiming for 2 servings of 1/4 tsp a day, just to boost vit c for a bit as i have found it helped with a sinus infection before.
Stupidly though I didn't think about the calcium that it would contain! According to the label there are 100mg of calcium per 1/4 tsp. Is 200-300mg (in case my serving sizes are too big) supplementation of calcium a day too much? I have heard that supplementing with calcium is really bad. The problem is I already have this massive jar...but if it is likely to be harmful I would suck it up and throw it away. I did see some magnesium ascorbate powder when I was shopping today so i guess that could be an alternative. But I would prefer not to waste the stuff I've already bought!