Spermidine

The reviewed SmartAge trial found no detected benefit on its primary memory outcome. Its wheat-germ formulation and older population limit generalization.

A change in a laboratory marker, a test score and everyday function are different outcomes. A statistically detectable result does not by itself tell us whether someone would notice a worthwhile difference.

Check the measured endpoint, comparison and study population. The full profile preserves effect estimates and the source's clinical-significance assessment, including when that assessment is not supplied.

The claim to test: A cognitive trial establishes a human longevity benefit.

What the reviewed records say:

The gap: One trial has been reviewed. Other regimens and studies still require review; human lifespan benefit and long-term safety remain unresolved.

Durability, effects in other populations and healthy-lifespan outcomes need their own evidence.

Independent replication, meaningful human outcomes, longer follow-up and better safety reporting would make these results easier to interpret.

One trial has been reviewed. Other regimens and studies still require review; human lifespan benefit and long-term safety remain unresolved.