The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
PhenoAge clock was most sensitive to heat exposure differences; both short and long term increases in ambient outside temperature correlated with increases in PHENOAge biological age; around 1 extra year for short term differences and over 3 years of increased biological age for maximum increases in extreme heat exposure over the previous 6 years.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
GrimAge, and PACE were both only sensitive to long term differences in heat exposure, with the GrimAge yielding 0.62 and 1.09 extra years of biological age (reduced remaining life expectancy) and PACE-score (speed of aging measure) increasing by 3% and 5%, for maximum increase in exposure to extreme heat over 1 and 6 years before measurement, respectively.
Published this week a study used three distinct epigenetic aging clocks to show that more hotter days on average (caution-level and extreme level heat) make you age faster.