The methylation cycle can seem hugely complicated to non-biochemists so a good reference book is essential to have any hope of understanding it and correcting any problems you might have using the correct supplements.

I have found far and away the most easily understandable yet in-depth book is Autism: Pathways to Recovery by Dr. Amy Yasko. It includes clear diagrams and takes the reader through the methylation step-by-step, or enzyme-by-enzyme, more accurately. It also explains the different forms of nutrients needed to get correct specific problems within the cycle (determined by SNPs and other factors).

I thought it was worth mentioning since the title of the book could easily turn away people it could help a great deal!

Read more about the book hear - http://www.ei-resource.org/environmental-illness-books/autism/autism:-pathways-to-recovery/