FoundMyFitness · 2019-06-10 · Rhonda Patrick (host), Elissa Epel
Dr. Elissa Epel on Telomeres and the Role of Stress Biology in Cellular Aging
46 claims checked against research: 2 contradicted 3 overstated 3 needing context 35 supported 1 corroborated online 2 unverified
3 Overstated
Life expectancy in the United States is approximately 78 years for men and 83 years for women.
"So for men, life expectancy is around 78 years in the United States, for women it's around 83 years." (said at 0:03:02)
According to National Vital Statistics Reports from the Centers for Disease Control and Prevention (CDC), life expectancy at birth in the United States is lower than stated for both sexes. In 2023, life expectancy at birth was 75.8 years for males and 81.1 years for females (with an overall population average of 78.4 years). Pre-pandemic 2018 figures were similarly 76.2 years for males and 81.2 years for females. The speaker appears to have mistaken the overall population life expectancy (~78 years) for male life expectancy and overstated female life expectancy (~81 years vs. the claimed 83 years).
- contradicts: United States Life Tables, 2018. (National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System 2020) · cited 373x in the literature
"In 2018, the overall expectation of life at birth was 78.7 years, increasing from 78.6 in 2017. Between 2017 and 2018, life expectancy at birth increased by 0.1 year for males (76.1 to 76.2) and females (81.1 to 81.2)." (abstract, results, passage verified)
pubmed - contradicts: United States Life Tables, 2023. (National vital statistics reports : from the Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System 2025)
"In 2023, the overall expectation of life at birth was 78.4 years, increasing 0.9 year from 77.5 years in 2022. Between 2022 and 2023, life expectancy at birth increased by 1.0 year for males (from 74.8 to 75.8) and by 0.9 year for females (80.2 to 81.1)." (abstract, results, passage verified)
pubmedfull study (doi)
Heavy metal exposure to cadmium and lead is associated with shorter telomeres in a dose-response manner.
"So heavy metals, cadmium, lead, those are directly in a dose-response way related to our telomere shortness." (said at 0:17:00)
Epidemiological studies, notably large NHANES analyses, demonstrate a clear, statistically significant dose-response association between cadmium exposure (measured in blood and urine) and shorter leukocyte telomere length. However, the evidence for lead exposure is mixed and inconsistent: major population-level analyses found no significant association between blood lead concentration and telomere length, though some subgroup models observed modest inverse associations. Stating that both cadmium and lead are definitively linked to telomere shortening in a direct dose-response manner overstates the evidence regarding lead.
- partial: Associations of cadmium and lead exposure with leukocyte telomere length: findings from Na… (American journal of epidemiology 2015) · cited 110x in the literature
"After adjustment for potential confounders, the highest (versus lowest) quartiles of blood and urine cadmium were associated with -5.54% (95% CI: -8.70, -2.37) and -4.50% (95% CI: -8.79, -0.20) shorter LTLs, respectively, with evidence of dose-response relationship (P for trend < 0.05). There was no association between blood lead concentration and LTL." (abstract, results, passage verified)
pubmedfull study (doi) - partial: Telomere dynamics and cellular senescence: an emerging field in environmental and occupati… (Critical reviews in toxicology 2018) · cited 44x in the literature
"There has been a steady output of epidemiological studies linking environmental and occupational exposures to altered telomere length, showing mainly positive associations with persistent organic pollutants, inverse association with cadmium and inconsistent results with arsenic and lead." (abstract, results, passage verified)
pubmedfull study (doi)
Circulating vitamin D levels between 40 and 60 ng/mL are associated with longer telomeres.
"Right, there was a sweet spot of vitamin D levels, I think it was something like 40 to 60 nanograms per mil, which was associated with longer telomeres as well." (said at 0:46:03)
While circulating 25-hydroxyvitamin D (25(OH)D) is modestly associated with leukocyte telomere length (LTL) and randomized supplementation has been shown to slow telomere attrition over time, there is no established optimal "sweet spot" of 40 to 60 ng/mL. A comprehensive 2026 meta-analysis of 21 studies (185,191 participants) found an overall positive association between vitamin D levels and LTL, but this association was driven primarily by individuals with vitamin D deficiency and was not statistically significant in individuals with 25(OH)D concentrations of 30 ng/mL or higher.
- partial: Vitamin D 3 and marine ω-3 fatty acids supplementation and leukocyte telomere length: 4-ye… (The American journal of clinical nutrition 2025) · cited 19x in the literature
"Compared to placebo, vitamin D3 supplementation significantly decreased LTL attrition by 0.14 kilo base pairs (kb) (95%CI: 0.007, 0.27) over 4 years (p = 0.039)." (abstract, results, passage verified)
pubmedfull study (doi) - contradicts: The association of serum levels of vitamin D with leucocyte telomere length, as a marker o… (Medicine 2026)
"The overall results demonstrated a positive association between serum 25(OH)D levels and LTL (β = 0.04, 95% CI = 0.02-0.06)... No significant associations were found in men, participants with serum 25(OH)D levels ≥ 30 ng/mL, children, or studies without covariate adjustments." (abstract, results)
pubmedfull study (doi)
Unverified means no publication matching the claim was located; it does not prove the claim false. Spotted an error? See the corrections policy - disputes from the people quoted are prioritized.