Some likely are fake.
I've used Ainterol and Barlowe's. I like Ainterol's product better, but there are sometimes supply and website issues with them. My main issue with Barlowe's is that it is a bit too strong, at 550 mg/pill, compared to Ainterol's 500 mg, and really 500 mg might even be a bit to strong for me...though don't want to go down to the companies that have 100 mg because they aren't significantly less expensive per pill, so to do like 400 mg would cost me quite a bit more.