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EurekAlert · 22 Sept 2026 · Nutrition

Excess free cysteine pried iron from ferritin and killed cells via mitochondria in a Rockefeller study

Study (cell). Toshitaka Nakamura, Kivanç Birsoy and Rockefeller colleagues report in Nature Metabolism that excess cysteine mobilizes iron from ferritin, floods mitochondria via SLC25A28, and triggers iron-dependent cell death. Glutathione does not do this, which may explain why cells spend energy packing cysteine into glutathione. Cell biology, not a diet trial. Educational research notes, not an amino-acid warning label.

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EIN Presswire / UNC Nutrition Research Institute · 21 Sept 2026 · Supplements / medicine

Six weeks of twice-weekly HIIT resistance training raised strength in perimenopausal women

Study (small training trial, described in a 21 September 2026 UNC Nutrition Research Institute briefing). Abbie Smith-Ryan reported a six-week high-intensity resistance program in perimenopausal women: two ~30-minute sessions a week with significant strength gains plus signals for muscle quality and early bone changes. Briefing, not a large multicenter RCT; sample size not fully reported in the public note. Educational exercise notes for midlife women, not a menopause drug substitute.

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News-Medical · 21 Sept 2026 · Supplements / medicine

Higher adolescent BMI tracked faster epigenetic aging in the Young Finns cohort

Study (longitudinal, genetically informed). Anni Pitkänen and University of Jyväskylä colleagues report in the International Journal of Obesity (doi 10.1038/s41366-026-02194-0) on the Cardiovascular Risk in Young Finns Study. BMI was measured at ages 9–18, with ~40 years of follow-up and DNA-methylation clocks in adulthood. A polygenic BMI score plus Mendelian randomization suggested higher adolescent BMI may be causally linked to faster biological aging, partly via adult BMI. Observational genetics, not a diet trial. Educational aging notes, not a weight-loss prescription.

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