I've been doing a lot of research over the past week, and reading all of your posts and comments as well. I've also posted some detailed descriptions of my research on two of these threads..... I've tried to analyze the MaCuj0 method, and other methods (Aloe Rid Clarifying Treatment), etc. I have found only ONE scietific abstract that clearly says of a treatment that likely reduces THC Metabolites in hair but as much as 30%!!!! And that is Perm and/or Bleach! IN THE END, here is what i have found out - What you have to do in order to HELP beat the hair test is use a product that can get through the outer armor of your hair's first layer, the cuticle, and then break down the very tight "disulfide" bonds of the inner layer, the cortex The CORTEX is where the THC metabolites (and hair pigments) are trapped. FORTUNATELY FOR US, their is a group COMMERCIALLY PRODUCED chemicals that are MADE TO DO EXACTLY THAT!!!! These are perm solutions (Ammonium Thioglycolate), and relaxers (Lye, or Sodium Hydroxide). ALL THE OTHER STUFF - including MaCuj0 method, is questionable and not really necessary, when these cheap and reliable products are available. These products have been created, designed and tested for EXACTLY the purpose we are trying to acheive!!!!! Go to the web site and look at the sections called "Hair Test", "Hair Upclose", and "The TR Process", and ALL IS EXPLAINED clearly, scientifically, and in a way anyone can understand. I will say here that because of the structure and nature of hair, African Americans and Asians should use hair RELAXERS rather than PERMS - those of you who do treat your hair likely already know that - but i'm a white guy with a crew-cut and don't even use gel, so what do i know? After a week of research, learning, and making my own "ideas" up, this one website explained it ALL - good luck to everyone!