I know a good bit about many different drugs, but I am quite new to Heroin. I am the type of person that enjoys knowing everything I can about the drugs I use. I have heard a little bit about Heroin #3, Heroin #4, etc. Is there anyone on here that would care to elaborate on this? When I get Heroin, I usually find stuff that is white, light beige, to light brown, to dark brown tar. All of these have varying potencies. I have noticed great differences in the effect of the highs from batch to batch, and I was wondering what exactly causes this. I know there are plenty of derivatives of Morphine, Fentanyl, and Heroin itself that can become byproducts in your Heroin. Which form of Heroin is the best?