I got this product for my mom, who struggles with damaged and brittle nails that bend under pressure. She loves to use her hands to do gardening, so I wanted to provide an option for her nail wellness. She loves this stuff. She started by applying daily for the first week, then every 3 days after. Now her nails are stronger than ever and have a wonderful lustre to them. I'm not a scientist, but I know they have a unique technology for each bottle for maximum nail care. Highly recommend to just give it a try for 2 weeks and assess from there. It can also be applied under other polishes! I was given this product in exchange for my honest review.