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This study observed that low levels of calcium and magnesium in blood serum were associated with health issues like hair loss and anxiety among participants from urban and rural Pakistan.

This study found that patients with alopecia areata atopica and other skin conditions had lower hair magnesium levels compared to healthy controls, although the differences largely overlapped.

This study found petroleum ether to be more effective than methanol at extracting β-sitosterol from Eclipta alba, with higher concentrations detected using HPTLC and HPLC methods. The extracted materials contained metals within safety limits.

In this study, Hibiscus rosa-sinesis flower extract was found to contain 0.33% quercetin according to HPTLC analysis and 0.37% according to HPLC. Heavy metals measured were within acceptable limits, supporting the standardization of the plant material for efficacy and safety testing.

This study measured heavy metal concentrations in Hibiscus rosa-sinensis, Eclipta alba, and Solanum nigrum, finding that levels for Cu, Cr, Cd, Hg, As, and Pb were within WHO safe limits, suggesting these medicinal plant extracts are free from heavy metal toxicity concerns.