Intervention
Spermidine-rich wheat-germ extract
Research Observatory
Evidence Update
Current evidence
Spermidine-rich wheat-germ extract, not pure spermidine, was compared with placebo for memory in older adults with subjective cognitive decline. The larger SmartAge trial did not confirm a memory benefit of spermidine-rich extract despite the earlier small pilot signal.
What changed
The larger extract trial did not confirm a memory benefit; the earlier pilot is uncertain context.
What did not change
The 0.9-mg extract regimen cannot be generalized to all spermidine doses or formulations.
Why it matters
Separates a corrected protocol from actual clinical results.
Main limitation
Pilot interval includes zero; extract is not interchangeable with pure spermidine or other doses. Null is not equivalence.
Next proof
Independent replication using justified dose and prespecified clinically meaningful cognition outcome.
Summary
Spermidine-rich wheat-germ extract, not pure spermidine, was compared with placebo for memory in older adults with subjective cognitive decline. The larger SmartAge trial did not confirm a memory benefit of spermidine-rich extract despite the earlier small pilot signal.
Intelligence Take
Separates a corrected protocol from actual clinical results.
Limitations
Pilot interval includes zero; extract is not interchangeable with pure spermidine or other doses. Null is not equivalence.