Iron release from the Lucky Iron Fish®: safety considerations

Area of Science:

• Public Health
• Nutritional Science
• Materials Science

Background:

• Iron deficiency anaemia is a significant health concern, particularly among women in rural Cambodia.
• The Lucky Iron Fish® offers a novel approach to iron supplementation.
• Assessing the safety of this intervention is crucial for its widespread adoption.

Purpose of the Study:

• To comprehensively evaluate the safety of the Lucky Iron Fish® for treating iron deficiency.
• To determine iron release, contaminant levels, and impact on water palatability.
• To establish safe usage parameters for the Lucky Iron Fish® in diverse conditions.

Main Methods:

• Mass spectroscopy to determine iron purity.
• Inductively-coupled plasma optical emission spectroscopy for iron and contaminant release analysis.
• Controlled experiments varying cooking time, acidity, and fish quantity in water and soups.

Main Results:

• The Lucky Iron Fish® is primarily composed of safe ferrous iron, with contaminants below WHO standards.
• Increased boiling time and acidity enhance iron release, but levels remain within safe limits even with multiple fish.
• Water palatability is maintained with one fish, but reduced with multiple fish, limiting overdose risk.

Conclusions:

• The Lucky Iron Fish® demonstrates a favorable safety profile for iron supplementation.
• The intervention is unlikely to cause iron toxicity due to controlled release and palatability factors.
• Findings support the Lucky Iron Fish® as a safe and viable tool for addressing iron deficiency in vulnerable populations.