Do you consider breastfeeding to be an environmental factor? Breastmilk contains the most microRNA of any body fluid[1] and has the potential to modulate gene

Do you consider breastfeeding to be an environmental factor? Breastmilk contains the most microRNA of any body fluid[1] and has the potential to modulate gene expression, so there may be ways breastfeeding affects the genome that we don't understand yet. How long a child is breastfed is associated with epigenetic differences in children.[2] Breastfeeding is negatively associated with the methylation of LEP. Childhood obesity is associated with lower cognitive performance.[3] 1. AAP talk on long term breastfeeding epigenetic effects: https://www.youtube.com/watch?v=-bUeSqPOCTc https://www.youtube.com/watch?v=-bUeSqPOCTc 2. https://pubmed.ncbi.nlm.nih.gov/32443666/ https://pubmed.ncbi.nlm.nih.gov/32443666/ 3. https://onlinelibrary.wiley.com/doi/10.1002/oby.22192 https://onlinelibrary.wiley.com/doi/10.1002/oby.22192