 to see if it would penetrate the area faster and it would get better results. And then also to apply it twice per day rather than once a day. But even with once a day, I am more than satisfied with the results that I got. I don't have any issues with my hair, but it is just to carry out an experiment. And if we are selling the products, it is good to use them as well that you can tell people directly what is happening. You can also speak. And it has a pleasant smell.