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January 2014 in “Dermatology Research and Practice” Many infants in Northern Ethiopia have zinc deficiency.
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June 2010 in “Dermatology Online Journal” Zinc supplements and weaning cured a breast-fed baby's zinc deficiency caused by a gene mutation.
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May 2004 in “Archives of Dermatology” Severe nutritional deficiency can cause serious health and development issues, including skin problems and hair loss.
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August 2015 in “Sultan Qaboos University medical journal” Vitamin B12 deficiency can cause skin darkening and other symptoms, which improve with B12 supplements.