Hi tinabambina....I use JBCO and it does make your hair thick and yes it does help with growth as well. I only apply it to my entire scalp once a week, but on the thinner areas like my nape and side areas I apply the JBCO perhaps 2 x week.
I do not seal with it because it is too heavy for my hair and I don't like greasy hair.
It does work and I love the results
Have a good day!!