Parents of overweight households tend to create overweight children. Not only is it caused by the overall diet of the family it is also due to expressed fat genes.
A woman’s bodyweight before and during pregnancy has a large influence on the future weight of her child. Children born to women who dad gastric bypass sugery are 1/2 as likly yo become obese.
A study done on Folic Acid mixed with other supplements shows that in mice the legacy of fatness can be broken.
Waterland, R.A., Travisano, M., Tahiliani, K.G., Rached, M.T., Mirza, S. (2008). Methyl donor supplementation prevents transgenerational amplification of obesity. International Journal of Obesity DOI