No difference [SEP] Unfortunately I did not notice a difference in the strength of my nails as the product promises. Also, it shouldn't be used as a base coat as my nail polish only lasted 2 days when using over this product. It also chips quickly as a stand alone as intended which is aggravating since it is supposed to strengthen the nail. Using nail polish remover weakens the nail as does peeling polish off. I didn't find it helpful.