October 2023 in “Medical records-international medical journal” People with AB blood type may be more likely to get melasma.
January 2020 in “Молодий вчений” B(III) blood type may have higher hemoglobin levels, but stress affects this, and hair iron levels correlate with hemoglobin in some blood types.
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January 2023 in “Dermatology Practical & Conceptual” AB+ blood group is more common in alopecia areata patients.
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April 2021 in “Experimental and Molecular Medicine” The conclusion is that certain genetic factors and blood types may affect COVID-19 severity, but changes in ACE2 and TMPRSS2 genes are not clearly linked to it.
March 2024 in “Asian Journal of Advanced Research and Reports” Smoking and alcohol are linked to early hair graying.