I have now tested the Growth Booster Hair Serum Against Hair Loss for a month and my rating is approved. I have short hair now, so broken hair strands are not something I usually have. But I don't experience that the product strengthens the hair fiber or extends the hair's life cycle in any way, or makes it thicker. I would say that I haven't experienced any effect at all. However, it has a nice scent and is easy to apply, etc.
The review was conducted on behalf of Smartson - the test pilot was allowed to try the product for free.