The Study
Abstract Mo108: Sex-specific Impact of Glutathione Precursor-supplemented Diet on the Aging Mouse Heart
This study gave special food to old mice and noticed that the male mice’s hearts seemed to work better afterward. But it didn’t prove the food caused the improvement — maybe the male mice were just luckier. We can’t say this would work the same way in people.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
Scientists gave old mice a special food mix (GlyNAC) to help their hearts fight aging, and only the males got better.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 514 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1These changes suggest male hearts became better at using energy and less stiff, which could mean better heart function and less heart failure risk.
- 2Male mice had 12% less heart swelling, 76% more Ndufb8, 101% more CPT1b, 88% more CrAT, and 21% more Fmod—females saw no changes.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Circulation Research
Year
2024
Authors
Aude Angelini, Grecia Garcia Marquez, A. Malovannaya, Marta L Fiorotto, A. Salzman, Antrix Jain, J. Trial, G. Taffet, Katarzyna A Cieslik
Related Content
Claims (6)
In older male mice, taking GlyNAC for 12 weeks results in a 1.76-fold higher level of the Ndufb8 protein in heart mitochondria compared to mice not taking GlyNAC.
In older male mice, taking GlyNAC for 12 weeks increases Fmod protein levels in the heart by 21%, and this protein reduces collagen fiber formation, leading to lower stiffness in heart tissue.
In older male mice, taking GlyNAC for 12 weeks increases the activity of two enzymes in heart mitochondria—CPT1b by 101% and CrAT by 88%—which are involved in fatty acid metabolism; no such changes occur in female mice.
In older mice, GlyNAC supplementation improves cardiac mitochondrial function, enzyme activity, and extracellular matrix proteins in males but does not produce measurable changes in females.
In older male mice, a 12-week diet with glycine and N-acetyl cysteine resulted in a 12% smaller increase in left atrial volume compared to a 20% increase in mice on a normal diet, and these mice also showed better exercise performance.
In older adults, taking supplements that help the body produce its own antioxidants leads to stronger improvements in biological signs of aging than taking antioxidants directly.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.