Nootropics definitely work.
Pretty big field. Everyone from executives to athletes are using them in some form right now.
If you look at the research behind each of the individual ingredients, it will paint a different picture.
Anyone who's actually used them as a student or who is involved with anything mentally intensive can attest that they're legit. To call them bullshit is just ignorance to the field as a whole.
Although I've never tried alpha brain. It's expensive for what you're getting. The individual ingredients themselves are legit though.
It's an 8-9 figure company. Lots of people using it for years. If it were bullshit, the backlash would be immense.