Excessive availability or deficiency of methyl groups, either periconceptional or during pregnancy, is biologically relevant in terms of genetic programming of the foetus but this area is currently under researched (McGee et al, 2018)
Durn, F
While animal-based foods are naturally rich in vitamin B12, many plant-based foods and breakfast cereals are fortified to help people meet their needs
Researchers controlled for maternal infections, autoimmune diseases, and other potential confounders
He frames it as triggering collagen production, repairing tissue, and helping regrow thinning hair (source)
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