Author name: Sofia Reyes

Sofia Reyes is a nutrition writer focused on gut health, the microbiome, and metabolic wellness. Sofia reviews the clinical literature and is careful to distinguish probiotic marketing from documented strain-level evidence. Information only, not medical advice.

What Is Spermidine

Polyamines 101: Understanding Putrescine, Spermidine, and Spermine

Sofia Reyes / June 19, 2026

Learn how the three main polyamines—putrescine, spermidine, and spermine—work in the body, why they decline with age, and where spermidine fits in longevity res

Comparisons

Spermidine vs. Urolithin A: Two Natural Autophagy Inducers Compared

Sofia Reyes / June 17, 2026

Spermidine and Urolithin A both induce autophagy—but via different pathways. An evidence-based comparison of two popular cellular health compounds.

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