Hair can accurately predict iron levels in cattle muscle, helping diagnose mineral imbalances.
January 2022 in “Bio web of conferences/BIO web of conferences” The conclusion is that normal trace element levels in newborn calves' hair are between the 25th and 75th percentiles, and levels outside this may indicate diselementosis.
Hair samples showed changes in chemical elements over time and location in Venezuela.
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April 2010 in “Anais Brasileiros de Dermatologia” Dermoscopy helps diagnose and monitor treatment for hair loss from scarring conditions like discoid lupus and lichen planopilaris.
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June 2012 in “Revista de la Escuela de Medicina Legal” Microscopes are essential for telling apart human and animal hair in criminal investigations.