Do whatever you want, use whatever and however you want. But, ever never ever tell people you are on regimen. Because people are stupid and when you tell them these, they really bring it up among other people, which really annoys me so much.
Also, it is good if you don't mention them about it so that when they say ' oh your hair has changed, are you doing anything with that?', you can know they are honest and their aim is not to encourage, which indeed will encourage you.
Also, it is good if you don't mention them about it so that when they say ' oh your hair has changed, are you doing anything with that?', you can know they are honest and their aim is not to encourage, which indeed will encourage you.