Sounds like my nails, never ever grow, very very dry, peel, split and now I am ageing vertical deep ridges. My whole life I have had awful nails. Bought kit from Margaret Dabbs QVC.It was a special offer. I bought it for the foot items that's what she is famous for. All of it is very very good. Don't love the huge hand wash BUT the Nail Serum is FAB! Better than all the nail products that I have tried over the years including Nail Envy. Even the OPI oil does nothing for my nails. But this nail product gives instant results. My ridges from first application are not so deep some of the less damaged nails don't even look ridge. If yo can get one on eBay shop around for the best price. it may not work for you we are all different but if it does .....My nails are pretty awful, crack & break painfully below the quick at nothing. I’ve never found Nail Envy helps much. Had best results with Nailtiques which used to be a reasonable price, around £12, on A but is stupid money now so can’t afford it, last time I looked it was £60+ . I did read once it was because their factory had burned down but don’t know if that’s true. So I’m still looking for anything that will help.