Homocysteine Increases During Aging, But Can Be Reduced With Diet And Targeted Supplementation

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Papers referenced in the video:

Bacteria Boost Mammalian Host NAD Metabolism by Engaging the Deamidated Biosynthesis Pathway: https://pubmed.ncbi.nlm.nih.gov/32130…​

Comparison of the effects of nicotinic acid and nicotinamide degradation on plasma betaine and choline levels: https://pubmed.ncbi.nlm.nih.gov/27567…​

Total plasma homocysteine and cardiovascular risk profile. The Hordaland Homocysteine Study: https://pubmed.ncbi.nlm.nih.gov/7474221/​

Total plasma homocysteine values among elderly subjects: findings from the Maracaibo Aging Study: https://pubmed.ncbi.nlm.nih.gov/16959…​

Hyperhomocysteinemia as a Risk Factor and Potential Nutraceutical Target for Certain Pathologies: https://www.ncbi.nlm.nih.gov/pmc/arti…​

Hyperhomocysteinemia and risk of incident cognitive outcomes: An updated dose-response meta-analysis of prospective cohort studies: https://pubmed.ncbi.nlm.nih.gov/30826…​

Association between Homocysteine Levels and All-cause Mortality: A Dose-Response Meta-Analysis of Prospective Studies: https://www.nature.com/articles/s4159…

Quantifying Biological Age: Blood Test #2 in 2021

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Paper references for Levine’s Phenotypic Age calculator and aging.ai:

An epigenetic biomarker of aging for lifespan and healthspan: https://pubmed.ncbi.nlm.nih.gov/29676…​

Population Specific Biomarkers of Human Aging: A Big Data Study Using South Korean, Canadian, and Eastern European Patient Populations:

https://pubmed.ncbi.nlm.nih.gov/29340…

Ergothioneine: A ‘Longevity Vitamin’ With Potential Benefits For Age-Related Outcomes?

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Papers referenced in the video:

Dietary Thiols: A Potential Supporting Strategy against Oxidative Stress in Heart Failure and Muscular Damage during Sports Activity: https://www.ncbi.nlm.nih.gov/pmc/arti…​

Ergothioneine levels in an elderly population decrease with age and incidence of cognitive decline; a risk factor for neurodegeneration? https://pubmed.ncbi.nlm.nih.gov/27444…​

Is ergothioneine a ‘longevity vitamin’ limited in the American diet? https://www.ncbi.nlm.nih.gov/pmc/arti…​

Frailty markers comprise blood metabolites involved in antioxidation, cognition, and mobility: https://pubmed.ncbi.nlm.nih.gov/32295…​

Ergothioneine is associated with reduced mortality and decreased risk of cardiovascular disease: https://pubmed.ncbi.nlm.nih.gov/31672…​

Ergothioneine – a diet‐derived antioxidant with therapeutic potential: https://febs.onlinelibrary.wiley.com/…​

Ergothioneine, a metabolite of the gut bacterium Lactobacillus reuteri, protects against stress-induced sleep disturbances: https://www.nature.com/articles/s4139…

Glutathione Restoration Improves Hallmarks Of Aging in Older Adults

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Papers referenced int the video:

Deficient synthesis of glutathione underlies oxidative stress in aging and can be corrected by dietary cysteine and glycine supplementation: https://pubmed.ncbi.nlm.nih.gov/21795…​

Glycine and N-acetylcysteine (GlyNAC) supplementation in older adults improves glutathione deficiency, oxidative stress, mitochondrial dysfunction, inflammation, insulin resistance, endothelial dysfunction, genotoxicity, muscle strength, and cognition: Results of a pilot clinical trial: https://pubmed.ncbi.nlm.nih.gov/33783…​

Glutathione declines during aging (Age-related changes in the glutathione redox system): https://pubmed.ncbi.nlm.nih.gov/11835…

Gut Bacteria Boost Host NAD Metabolism

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Papers referenced in the video:

Bacteria Boost Mammalian Host NAD Metabolism by Engaging the Deamidated Biosynthesis Pathway: https://pubmed.ncbi.nlm.nih.gov/32130883/

CD38 Dictates Age-Related NAD Decline and Mitochondrial Dysfunction through an SIRT3-Dependent Mechanism: https://pubmed.ncbi.nlm.nih.gov/27304511/

Aerobic and resistance exercise training reverses age-dependent decline in NAD + salvage capacity in human skeletal muscle: https://pubmed.ncbi.nlm.nih.gov/31207144/

Telomere Length: How Does it Compare Against Other Biological Age Metrics?

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Papers referenced in the video:

The Hallmarks of Aging: https://www.ncbi.nlm.nih.gov/pmc/arti…​

Telomere Length as a Marker of Biological Age: State-of-the-Art, Open Issues, and Future Perspectives: https://www.ncbi.nlm.nih.gov/pmc/arti…​

Telomeres and the natural lifespan limit in humans: https://www.ncbi.nlm.nih.gov/pmc/arti…​

Telomere Length and All-Cause Mortality: A Meta-analysis: https://pubmed.ncbi.nlm.nih.gov/30254…​

Comparability of biological aging measures in the National Health and Nutrition Examination Study, 1999-2002: https://pubmed.ncbi.nlm.nih.gov/30999…​

Longitudinal trajectories, correlations and mortality associations of nine biological ages across 20-years follow-up: https://elifesciences.org/articles/51507​

Eleven Telomere, Epigenetic Clock, and Biomarker-Composite Quantifications of Biological Aging: Do They Measure the Same Thing? https://pubmed.ncbi.nlm.nih.gov/29149…

HDL Update: Age-Related Changes, All-Cause Mortality Risk, And Progress Towards The Optimal Range

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In November 2020, I made a HDL video based on a meta-analysis in ~3.4 million subjects that was published in July 2020. In Dec 2020, a larger study (n=15.8 million subjects) was published-those data are presented in the video, and compared against the meta-analysis.

In addition, I’ve tested my HDL 2 more times since November 2020, so how’s my progress for getting it into the optimal range? Also, I attempt to derive clinical significance by identifying correlations for higher HDL with lower Lp(a) and hs-CRP.

Video link: https://www.youtube.com/watch?v=MUuKlpyvZaU

Carotenoids Are Associated With A Younger Epigenetic Age And Reduced All-Cause Mortality Risk

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Papers referenced in the video: DNA methylation

GrimAge strongly predicts lifespan and healthspan:

https://pubmed.ncbi.nlm.nih.gov/30669…​

GrimAge outperforms other epigenetic clocks in the prediction of age-related clinical phenotypes and all-cause mortality:

https://pubmed.ncbi.nlm.nih.gov/33211…​

Dietary intake and blood concentrations of antioxidants and the risk of cardiovascular disease, total cancer, and all-cause mortality: a systematic review and dose-response meta-analysis of prospective studies: https://pubmed.ncbi.nlm.nih.gov/30475…​

Albumin is included as a biological age predictor:

https://www.ncbi.nlm.nih.gov/pmc/arti…​

https://www.ncbi.nlm.nih.gov/pmc/arti…​

https://www.ncbi.nlm.nih.gov/pmc/arti…​

https://pubmed.ncbi.nlm.nih.gov/30993…​

Age-related change data for albumin:

https://pubmed.ncbi.nlm.nih.gov/26071…​

Associations of cardiovascular biomarkers and plasma albumin with exceptional survival to the highest ages: https://www.nature.com/articles/s4146…

Quantifying Biological Age: Blood Test #1 in 2021

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Results for my first blood test in 2021 are in-what’s my biological age, and how am I optimizing it?

If you’re interested in calculating your biological age, the spreadsheet is included as an Excel file in this link:

https://atomic-temporary-71218033.wpcomstaging.com/2019/09/09/quantifying-biological-age/