benifits or each...sets see... help maintain or regrow hair? Well, that's what they do. The tricomin worked on humans in a 6 month fda phaseII test, but costs $50. The folligen worked on animals in a test done by the guy who sells them, and has different CPs, but people on this site say it worked good for them. It is half the price. The AC spray was even cheaper, and had the tricomin peptides, but not anymore. It looks like they got tired of paying royalties to the makers of tricomin. Prox-N has copper and zink peptides, and I don't know what the peptides are. It also has other stuff, and is the most expensive one, and considered the strongest.
I bought the last cheap AC spray on ebay. Yea! half off.