Matthew Walker on health: what the evidence says · JRE #1109
“This is why you being so much more likely for example to be struck by lightning in your lifetime the odds of which I think about 1in 12,500 than you ought to have this incredibly rare Gene.”
What the evidence says
A rare mutation in the DEC2/BHLHE41 gene, first identified in a single family in 2009, has been linked in small studies to naturally short, high-quality sleep with resistance to the effects of sleep deprivation. Population-wide prevalence has not been rigorously measured: the mutation was identified through case studies of specific families and twin pairs rather than large-scale genetic surveys, and a 2021 systematic review of natural short-sleeper genes noted that research on prevalence remains limited. Walker's claim that carrying the gene is rarer than being struck by lightning is not a matched statistical comparison: the lightning figure he cites (about 1 in 12,500) does not match the official National Weather Service estimate of a 1-in-15,300 lifetime chance of being struck, and no study has established a comparably precise population frequency for the short-sleeper gene mutation. The general idea that the mutation is uncommon is consistent with existing genetics research, but the specific numeric comparison to lightning-strike odds is a rhetorical flourish not supported by matched data.