Do kiss nails hurt your natural nails?

Not exactly. It'll make them a little weaker and more fragile, but im a vegetarian- who lacks protein in my diet- so my nails are very fragile. However I still use these nails and as long as I take them off at the end of one to two weeks and let them breathe a couple days they haven't really gotten to any worse a condition they were already in. Just be careful when taking them off that you dont rip off some of the layers of your nails.