Ok not sure if this is the right spot for this so here it goes. A coworker of mine vapes and she has this stuff called Ry-k. I have been to local places and only found Ry-4. I have asked her where she gets it but she says it's at some shop that's a good distance from me and says that the k is his special ingredient. I find this a little bs but I'm new to vaping. Does any one know the difference between the ry-4 and Ry-k?