Botanical guide · Ingredient reference

Saffron versus fluoxetine: a pilot’s similar scores did not prove equivalence

A small six-week study reported no significant difference between saffron and fluoxetine. That result is not sufficient to establish that the treatments are equally effective.

Read the evidence ↓

Supplement Science Insights Editorial Team

Published September 23, 2026

Study and results

Forty adults with mild-to-moderate major depression entered a randomized, double-blind comparison of saffron stigma extract and fluoxetine. The study used two active treatments without a placebo arm. [1]

The reported depression-score comparison did not significantly differ, and observed adverse-effect frequencies were also similar. The investigators called for a larger trial. [1]

Interpretation and limitations

The abstract does not establish a prespecified equivalence margin or adequate power for equivalence. A small study may miss a meaningful difference. Funding and conflicts were not established; these findings are not a reason to replace prescribed depression treatment or infer a universal response timeline. [1]

A hypothetical distinction

Imagine two small groups have similar average scores. Wide uncertainty can still permit clinically important differences in either direction.

Evidence summary — Saffron versus fluoxetine
DetailInterpretation
Nonsignificant differenceNot proof of equality
Active comparatorNo placebo in this trial
Clinical substitutionNot established
Saffron versus fluoxetine: a pilot’s similar scores did not prove equivalence — original article outline diagram
Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

Sources for this article

  1. Hydro-alcoholic extract of Crocus sativus L. versus fluoxetine in the treatment of mild to moderate depression: a double-blind, randomized pilot trial - PubMed
    Source consulted: 2026-09-19. This is a reference resource, not a claim that we conducted the studies or tested a product.