Four major regions (Birjand, Zirkoh, Darmian, and Qaen) of barberry cultivation in South Khorasan, Iran, were selected and investigated. According to the findings, the most abundant mineral elements in the barberry fruits were on average in the order of potassium > phosphorus > calcium > iron > magnesium. The greatest amounts of potassium and calcium were detected in the samples from the Zirkoh region, and the greatest amounts of phosphorus and iron were detected in the samples from the Qaen region. The amounts of zinc and copper in the Birjand, Zirkoh, and Darmian regions were recorded within the allowed range. Heavy elements arsenic and mercury were not present in the samples from all four regions. However, among the studied areas, the Birjand area had the lowest amount of lead and cadmium. According to food standards (FAO and WHO), lead concentration was to some extent greater than maximum level.
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