UIImageWriteToSavedPhotosAlbum - Photo quality degraded

Hi - I have gone through some of the discussions related to UIImageWriteToSavedPhotosAlbum.When we use this the photo quality will reduce.I searched in all the discussions and didn't find any alternative solution for this.

I also have the same problem, when I download an image and I am saving it to the camera roll.But the photo quality or size get reduced.What I observed is, it is missing some of the meta data information.Is this the behavior of this method?Do we have any alternative for this to achieve the original quality of the image?

Please let me know.