The word 'strengthening' in a shampoo refers to the condition of the hair, not to a change in growth. This shampoo-conditioner contains hydrolyzed collagen and hydrolyzed wheat protein. Because these proteins are broken into smaller fragments, they can coat the hair shaft more evenly and form a light film. That film can make strands feel denser, smoother, and better protected from friction, heat, and dry air. Panthenol in the formula helps attract and hold moisture, which can make hair look shinier and less brittle. Burdock extract, wheat extract, and hops extract are included because they are often used in products aimed at weak-looking hair; they help the scalp feel fresher and the hair appear more lively from root to length.
No shampoo can change how fast hair grows in a medical sense. Hair growth happens at the follicle, and a cosmetic product cannot alter that process. What a well-balanced cleansing product can do is improve the overall condition of the scalp and reduce the dry, tired feeling that often makes hair seem less abundant. So if you are looking for smoother, fuller-feeling hair after washing, this product may be useful. If you are looking for faster growth, this is not a treatment for that.