Fact of the day

Tuesday, 20 October 2026

Women's Healthpreliminary · human dataDiscovery of the day

A review of eleven controlled trials found iron supplementation improved memory and intellectual ability in women aged 12 to 55, including those who were not anaemic, while three studies suggested zinc may help treat depressive symptoms.

Study design
Systematic review
Journal
Nutrients
Evidence
preliminary

What it shows: Promising but not settled: a sweep of all the studies on this turned up only ten randomised trials plus one other, and the authors themselves say better-designed trials are needed before firm conclusions. The benefits appeared mainly where iron or zinc status was low to begin with.Systematic review · Nutrients

Increasing iron and zinc in pre-menopausal women and its effects on mood and cognition: a systematic review. Nutrients 2014Read the study →

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