Calcium chews

I have seen alot of referrence to these and they seem like a great way to get some calcium in without another pill. What I can't figure out though is why people are ordering them from the states..online sites? Am I missing something here? I have seem them in superstore etc and they have the same dosage as the ones from the "bariatric" type sites..so is it the taste? The price is about the same..they have a couple of different flavours?? Anyone, please enlighten me.

 I believe the ones here have calcium carbonate which isn't easily absorbed but we need to take calcium citrate .I've never seen the citrate ones here 

I have been using the calcuim chews from here. There are many different brands. The jamieson chews havea mixture of different types of calcuim. I take one with a Vit D chew from jamieson as well. My labs have always been Good.