You might find some answers in the following articles:
1.
Maternal exposure to fluoxetine during gestation and lactation affects the DNA methylation programming of rat's offspring: modulation by folic acid supplementation.
Epigenetics Chromatin. 2014 Feb 3;7(1):3. doi: 10.1186/1756-8935-7-3.
3.
Impact of folic acid fortification on global DNA methylation and one-carbon biomarkers in the Women's Health Initiative Observational Study cohort.
Bae S, Ulrich CM, Bailey LB, Malysheva O, Brown EC, Maneval DR, Neuhouser ML, Cheng TY, Miller JW, Zheng Y, Xiao L, Hou L, Song X, Buck K, Beresford SA, Caudill MA.
Epigenetics. 2014 Mar;9(3):396-403. doi: 10.4161/epi.27323. Epub 2013 Dec 3.
4.
Nutri-epigenetics ameliorates blood-brain barrier damage and neurodegeneration in hyperhomocysteinemia: role of folic acid.
Kalani A, Kamat PK, Givvimani S, Brown K, Metreveli N, Tyagi SC, Tyagi N.
J Mol Neurosci. 2014 Feb;52(2):202-15.
5.
Nutrition in early life, immune-programming and allergies: the role of epigenetics.
Amarasekera M, Prescott SL, Palmer DJ.
Asian Pac J Allergy Immunol. 2013 Sep;31(3):175-82.
6.
You are what you eat, and so are your children: the impact of micronutrients on the epigenetic programming of offspring.
Vanhees K, Vonhögen IG, van Schooten FJ, Godschalk RW.