National Institute on Drug Abuse (2025)

Article contents Abstract Introduction Urolithin A: sources, dosage and mechanism of action Spermidine: sources, dosage and mechanism of action Urolithin A and spermidine in autophagy and mitophagy: studies in vitro In vivo studies on urolithin A and spermidine Clinical studies on urolithin A and spermidine Conclusions Financial support Competing interests Authorship Consent for publication Declaration of generative AI and AI-assisted technologies in the writing process References Distinct roles of urolithin A and spermidine in mitophagy and autophagy: implications for dietary supplementation Published online by Cambridge University Press: 17 December 2025 Abstract Introduction Urolithin A: sources, dosage and mechanism of action Spermidine: sources, dosage and mechanism of action Urolithin A and spermidine in autophagy and mitophagy: studies in vitro In vivo studies on urolithin A and spermidine Clinical studies on urolithin A and spermidine Conclusions Financial support Competing interests Authorship Consent for publication Declaration of generative AI and AI-assisted technologies in the writing process References Abstract The increasing focus on longevity and cellular health has brought into the spotlight two key compounds, urolithin A (UroA) and spermidine, for their promising roles in autophagy and mitophagy

The Retatrutide participants lost around 24.2% over 48 weeks at the highest dose
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Brain and focus: Unlike many nutrients, Acetyl L-Carnitine breaks through the blood-brain barrier, where it supports the production of acetylcholine, a chemical messenger important for memory, concentration and clear thinking [1]