Hair loss prevention shampoo

My hair has been falling out since spring and it’s getting worse. I’m very worried, so I tried all the black foods that are said to be good for hair loss, but I didn’t see much effect. However, I read reviews saying that using a hair loss prevention shampoo definitely reduces hair fall and helps prevent it. Can I use a hair loss prevention shampoo? I’m still young and not at the stage of undergoing procedures or surgery. How do you manage it?