I eat lowfat yogurt and lowfat cottage cheese daily. I purchase mine from Trader Joe's (health store near my house), so there's no additives. I just get the plain, no flavor and just add a pinch or two of dried fruit (from trader joe's too and loaded with fiber) or cut up fresh fruit for taste.
On a side note...
If anyone has a Trader Joe's around them I def. recommend checking it out. So many wholesome, organic foods and it's so reasonable..unlike many other health food stores.
Ok back to question at hand....
Aside from keeping bones & muscles strong, since dieting sometimes breaks them down, cacium also fights against bone deterioration as one ages (which is why some form of weight lifting is a must too). I also have read articles with research\statistics stating that calcium aides in digestion and metabolism function.
Regardless, I wouldn't 'eliminate' anything from your diet especially one that is packed with vit.s & nutrients. I would look at the labels though...some of them are packed with sugar. Try a plain lowfat one and add some fresh fruit, it's just as yummy!!