I found this excellent description in Amy Yasko's forum: ch3nutrigenomics.com. It was posted by one of the members on the site- raji: http://www.ch3nutrigenomics...
This is a private blog, but it is a very rich source of information about methylation, nutrigenomics and dietary supplementation
Here is a copy of the post:
Methyl group: A methyl group is simply a single carbon atom bonded to 3 hydrogen atoms (CH3).
Methylation: Transfer of methyl groups from one chemical to another is called methylation. Essentially any chemical compound that has a methyl group as part of its chemical ... ..more
Urine & stool changes throughout #detoxification . Oftentimes, the urine will change in color and/or clarity as you layer in important cofactors and #methyl groups. The following rules typically apply and if in doubt, obtain a UTM/UEE or fecal metals. Bear in mind that #cadmium precedes lead whereas #nickel often precedes #mercury. You may also see high cadmium levels due to the presence of #HPylori. Moreover, high viral #titers tend to coincide with the presence of heavy metals. Dr. Yasko has found that in some cases, the mercury and other metals were not eliminated (even with chelation therapy) until the ... ..more