What are the other factors? In the case of the CBS gene regulation, it is other CBS SNPs. There are no known harmful up-regulations, and only known pathogenic major down-regulations. And it is known that these CBS SNPs don't cause problems.It's not the single SNP, it's the combination of that one with others forming a dynamic. Genetics is a systems science, not a singular causal one. A SNP is a factor, not a cause.
So at best you are left with an infinite number of outside possibilities which essentially reduce the involvement of these CBS SNPs to 0. In which case, it's still not a CBS problem, and certainly not attributable to those specific SNPs.
No one has questioned your experience. What is being questioned is your assumption about the cause. Your assumption about the cause is being questioned both because it is illogical (everyone has those SNPs), and because it is contradicted by the published research.So I seriously question the motivation of anyone trying to imply someone's experience is not valid because the science is imperfect.
Treatments for sulfur intolerance may produce benefits for a myriad of reasons. There might even be dozens of such reasons which are plausible. But it doesn't make sense to pick a cause which contradicts the scientific research showing that the SNP has a tiny effect, especially when heterozygous.
Misinformation is not useful. Whereas a debate regarding the accuracy and reasonableness of claims can be elucidating for all.One can comment on a forum to try to help others or provide useful information, and one can comment simply to baselessly dismiss others. Why is this forum so full of the latter?