Crikey, never heard of it and I use Dr Lee's products. Not going to touch it though. I've heard that finasteride can be absorbed via the scalp and given my experiences with finasteride I'm not going near any finasteride related products with a 10+ foot barge pole.
Possibly, but finasteride is supposed to have a near flat response, i.e. somewhat dose independent of DHT suppression so even a little systematic absorption might pose a risk to people like me.