Spermidine

Spermidine (CAS 124-20-9), also abbreviated as SPD, is a naturally occurring polyamine sourced from plant and microbial origins, available in both synthetic and natural-extract forms. In commercial supply, it functions as a bioactive ingredient targeting cellular renewal pathways, a biochemical reagent in research workflows, and a functional additive in premium formulations.

In cosmetics and personal care, SPD is incorporated into anti-aging serums and scalp treatments where it supports hair follicle longevity and skin renewal at the cellular level. Pharmaceutical and nutraceutical manufacturers use it as the active ingredient in longevity-focused dietary supplements, capsules, and functional foods — a fast-growing category driven by autophagy research.

In biotechnology, spermidine is a critical reagent in cell culture media, nucleic acid stabilization protocols, and enzyme activity studies for various laboratory applications. Food-grade applications include functional food fortification, where wheat germ extract standardized to spermidine content is the most commercially established delivery format for manufacturers.

Spermidine is supplied as a trihydrochloride salt in powder form, which offers improved stability over the free base. Standard grades include research-grade (high-purity ≥98%) and cosmetic/nutraceutical-grade material. Wheat germ extract standardized to defined spermidine content is also commercially available as a natural-source alternative for food and supplement applications meeting specific quality requirements.