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Selenium Selenium is a trace mineral which acts following incorporation as selenocysteine into selenoproteins, among which thioredoxin reductases (TRs), GPX, and iodothyronine deiodinases (D1, D2 or D3) are the best known (5, 47)

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Its anti-aging mechanisms are more targeted: Telomerase activation : Directly upregulates hTERT (human telomerase reverse transcriptase) mRNA expression, activating the telomerase enzyme Telomere extension : Has been shown to increase telomere length in human cell lines, extending replicative lifespan beyond the Hayflick limit Melatonin modulation : Stimulates melatonin secretion from the pineal gland, which may improve sleep quality and circadian rhythm regulation Cortisol regulation : May help normalize cortisol patterns that become dysregulated with age Epigenetic effects : Appears to interact with promoter regions of the telomerase gene, potentially binding ATTTC motifs to modulate transcriptional activity Mechanistic Comparison# Research Evidence Comparison# Carnosine Research# Carnosine has extensive research across multiple domains: Human clinical trials : Exercise performance: Beta-alanine supplementation (raising muscle carnosine) improves high-intensity exercise capacity in hundreds of studies Type 2 diabetes: Carnosine supplementation improved glycemic control in multiple RCTs Cognitive function: Studies in elderly subjects showed improved cognitive measures Anti-aging biomarkers: Human studies demonstrate reduced AGE formation and oxidative stress markers Preclinical highlights : Extended lifespan in senescence-accelerated mice Reduced oxidative damage and lipid peroxidation in multiple animal models Neuroprotective effects in Alzheimer's disease models Cardiac protection in ischemia-reperfusion models Evidence level : Moderate to high -- multiple human RCTs for specific outcomes, extensive preclinical support