I’m just reaching the end of my second bottles of this combination. My hair feels a little less brittle and definitely has a nice shine. It’s still thinning, quite brittle and very fine. It’s a daft question but how do you know when to stop using it. I don’t know how much of an improvement is realistic or achievable with it. I’m post menopausal so much of my problem comes from stopping HRT after 7 years.