My hair on the crown of my head looks thin. Will Pantodil Hair Ampoule be effective?

Hello. As I enter my mid-40s, I am under a lot of stress because my hair has noticeably thinned and the crown of my head seems to be getting bare. I have tried changing shampoos and eating black beans, but without any significant improvement, so I am planning to try the Pantodil Hair Ampoule, which is applied directly to the scalp. I have heard that it is very effective for providing nutrients. I am wondering if anyone who has used it has experienced new baby hairs growing or their hair becoming thicker. My scalp is a bit sensitive, so I am also worried about whether it might feel sticky or cause itching after application. What is the best usage frequency for the Pantodil Hair Ampoule? I am curious whether I should apply it every night or just after shampooing. I am feeling anxious because I heard that you shouldn't miss the "golden time" for hair loss management. I would appreciate advice from those who are knowledgeable about the Pantodil Hair Ampoule. It would also be a huge help in making my purchase decision if you could let me know if it is worth the price.