Short answer: Spermidine is studied for supporting a natural cellular process linked to healthy aging — a genuinely researched longevity ingredient, with an indirect, plausible extension toward brain cells specifically.
What "cellular maintenance" actually refers to
Spermidine is studied for supporting autophagy, a natural cellular recycling and maintenance process linked to healthy aging — the most developed research angle among this formula's four ingredients.
Why this may have indirect relevance to brain cells
If cellular maintenance processes support healthy aging generally, brain cells — like any other cell type — could plausibly benefit, though this specific extension is less directly proven than the general cellular-aging research.
Why this is the formula's strongest evidence pillar
Among the four named ingredients, Spermidine's research is the most directly relevant and best-developed — worth understanding as the formula's primary evidence anchor, with the fiber ingredients playing a more theoretical, supporting role.
See Spermidine in IQHoney's formula
Rated "moderate" evidence, honestly, alongside three others.
See the Ingredients