Spermidine is a so-called polyamine and is present predominantly in the nucleus and in ribosomes. It plays an important role in the synthesis of nucleic acids and of proteins, as well as in cell development. It is therefore closely associated with cell growth. Although the body can produce its own spermidine, with age production diminishes significantly. During pregnancy, growth and even after intense physical effort, spermidine levels can rise strongly.In a current study, scientists tested the effects of spermidine in the fight against Alzheimer's and Parkinson's – with very interesting results. In the human body, spermidine is important for the various cell processes and accelerates the removal of cellular waste (autophagia). This waste, which builds up in the cells over time, consists mainly of incorrectly folded proteins and is suspected of triggering Alzheimer's in brain cells. Since treatment of the disease after its onset is difficult, researchers are increasingly looking at prevention.