There is even a CRISPR guide floating online for the curious, published by Zayner's startup.
However, the guide doesn't help us identify the injection sites in the human body to deliver the solution. Zayner injected Myostatin in his arm muscle.
Another biohacker's Youtube video describes making a pill for targeting stomach cells in a bid to cure lactose intolerance "Developing a Permanent Treatment for Lactose Intolerance Using Gene Therapy"
In general, how does one determine the most suitable site and or methodology for administering CRISPR in the human body that is appropriate for the gene and/or condition we are targeting?
EDIT: Personally, in my case, the gene of interest is ABCC11. I do note that most CRISPR (or any other gene therapy technique for that matter) attempts may target conditions involving more than one gene. However, why I think this gene and its associated conditions is unique is due to the fact much is written online about the effects of a single gene mutation in this particular gene. A paragraph on Wikipedia states:
Physical human traits that are controlled by a single gene are uncommon. Most human characteristics are controlled by multiple genes (polygenes) although ABCC11 is a peculiar example of a gene with unambiguous phenotypes that is controlled by a SNP. Additionally, it is considered a pleiotropic gene.
Official Pubmed documentation : A SNP in the ABCC11 gene is the determinant of human earwax type.