High levels of manganese in raspberries pose health risks for consumers.
The study looked at how manganese behaves in soil and raspberry plants near manganese ore deposits. They used a method called atomic absorption spectroscopy to measure manganese levels in soil and plants. They also checked levels of iron, zinc, and copper in the soil and plants. The soil had low available manganese, but high total manganese. The soil's properties helped keep manganese from being taken up by the plants. Most of the absorbed manganese ended up in the leaves and roots of the raspberry plants, with less in the stem and fruits. This pattern is seen in all food crops.