Of course, more relevant is to keep from methylating new DNA, and there we can actually make choices that matter.
And from there, the related cites and papers.
This is something that is active research as other diseases are also "turned on" by incorrect methylation. DNA methylation in human diseases - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6147084/
Of course, more relevant is to keep from methylating new DNA, and there we can actually make choices that matter.