absolutely not! they will not "ruin" your nails!!! If you have the proper nail tech working on you. I am a nail technition...for over 6 years now and i have removed many of my clients acrylics that they had on for many years, and as soon as the nail grows out you have the same nails you had before you put acrylics! if you have nice nails, just take care of them. if you want other option because you are not happy with your natural nails go for acrylic.