Iron supplements in the fight against lead

Targeted iron supplements in biscuits can achieve a striking reduction in the level of lead in children's blood in regions with high exposure to this toxic heavy metal. This has been demonstrated for the first time by an ETH-led research group in a study of schoolchildren in Morocco. Lead is a toxic heavy metal that was added to petrol for use in cars until as recently as 25 years ago, including in Switzerland. It is particularly harmful to the developing brains of infants, children and teenagers, and the damage it does is irreversible. The situation becomes significantly worse if people are exposed to a high level of lead at the same time as they are suffering from iron deficiency. In the small intestine, lead and iron bind to the same transport protein, which absorbs the metals into the bloodstream. If someone consumes too little iron with their food, the transporter increases its activity, and can carry lead into the bloodstream instead, leading to increased levels of the toxic heavy metal in the body and brain.