Not specifically Paleo, but relevant to our discussions last month of child health, is UK research reported on the BBC site on Friday: http://news.bbc.co.uk/1/hi/health/3113531.stm An extract: "Our study demonstrates how early environmental factors can alter gene expression without mutating the gene itself. The implications for humans are huge because methylation is a common event in the human genome, and it is clearly a malleable effect that is subject to subtle changes in utero." The researchers found evidence of DNA methylation in many different types of cell throughout the bodies of the baby mice - indicating that the process was triggered at an early stage of gestation." __________________ Keith