Popular Anti-Aging Compound Polyamines May Actually Fuel Cancer Growth

Polyamines, particularly spermidine, have become popular anti-aging compounds due to their ability to stimulate autophagy—cellular recycling that clears damaged components. These naturally occurring molecules are found in every living cell and play vital roles in cell growth and specialization. However, researchers have long puzzled over why the same molecules linked to longevity are also found in high levels in aggressive cancers.

Researchers at Tokyo University of Science conducted an extensive study using advanced proteomic methods to analyze over 6,700 proteins in human cancer cell lines. They discovered that polyamines operate through entirely different pathways in cancer versus healthy cells. In normal cells, polyamines work through eIF5A1 protein to support beneficial processes. In cancer cells, they activate eIF5A2, a nearly identical protein that shares 84% of the same amino acid sequence but behaves dramatically differently.

The key finding reveals that in cancer cells, polyamines primarily boost glycolysis—rapidly converting glucose to energy—rather than enhancing mitochondrial respiration associated with healthy aging. The research also showed polyamines increase levels of eIF5A2 and five ribosomal proteins linked to cancer severity.

This discovery has significant implications for longevity enthusiasts who supplement with polyamines. While these compounds may offer anti-aging benefits in healthy individuals, they could potentially accelerate existing cancers through different molecular mechanisms. The research suggests the need for careful consideration of polyamine supplementation, particularly for individuals with cancer risk factors or existing malignancies.