The Claim
Fasting-induced lifespan extension in fruit flies and nematodes requires spermidine, because genetic or pharmacological inhibition of spermidine synthesis eliminates the increase in lifespan caused by intermittent fasting.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In fruit flies and nematodes, the lifespan extension caused by intermittent fasting depends on spermidine; blocking spermidine production removes the lifespan increase.
See the scientific wording
Fasting-induced lifespan extension in fruit flies and nematodes is dependent on spermidine, as genetic or pharmacological inhibition of spermidine synthesis abolishes the longevity benefits of intermittent fasting.
When an organism fasts, its cells produce more spermidine, which activates a protein called eIF5A by adding a special chemical group to it. This activated protein then tells the cell to start cleaning out damaged parts by breaking them down in a process called autophagy. This cleanup allows the cell to function better and live longer, which extends the overall lifespan of the organism.
What the research says
1 studyStudy: Spermidine is essential for fasting-mediated autophagy and longevity
When flies and worms fast, they make more of a chemical called spermidine, which helps them live longer. But if scientists block their ability to make spermidine, fasting no longer makes them live longer — so spermidine is needed for the benefit.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.