Sparitual Nutri-Thick is a Calcium Nail Builder. This stuff is absolutely amazing! I have used it now for 1 month and applied it 8 times; 2 times weekly. Calcium to build nail strengthener to make thick, tough, strong nails that do not bend, break or create hang nails. Love love love my nail treatment, doesnt have a strong scent. good price on Sale, hard to find; I ordered through a nail salon