Not particulary. They even use isopropyl alcohol, which is a good sign of a product made with components from the local drug store. Unfortunately, the local drug store doesn’t have the hormones needed to make pheromone products.
If you want a supplier in the UK, try Dr. George Dodd. He was actually instrumental in the early discovery of many pheromone molecules, so you’d be in excellent hands. I don’t remember what his website his at the moment, but I’m sure someone can fill in.
They also have the old “wipe” products (you wipe them on w/ a little moist towelette) from him, which I don’t think are produced anymore. I tried them a few times, and they were nice. For the longest time, it was the most social product I’d ever tried.
Dodd’s products were definitely the real thing. He has some new ones for sale now, and you can pick up older ones on ebay.co.uk. I think the older ones were under the KioTech brand. Again, not sure if they were ever re-released.