I'm only 10 days in, so I don't have the best concept pf it yet, but it seems to be helping a little. Maybe it's all in my head, but I can assume that it has to at least be better than the off-the-shelf shampoo/conditioner combo I was using. I wouldn't say this is a ground breaking product, but it's worth giving a try if your have thin hair. Plus, Loco Beauty sells the Duo for pretty cheap comparatively. These bottles will definitely last me more than a year, so for that, it's worth it. Biggest downfall of product is that it smells like icy-hot. It doesn't seem to linger long after the shower though, so I can live with it.