Baik I, et al. - Authors evaluated a possible link among obstructive sleep apnea (OSA), iron status, and male-pattern baldness (MPB). They conducted polysomnography (PSG) and hair assessments in a cross-sectional study including 932 men aged 46–76 years. They assessed the serum transferrin saturation (TSA) levels. In men who have a family history of hair loss, OSA may be a risk factor for MPB. An association between low serum TSA hypoxia may be involved in a pathway linking OSA and MPB. They noted a significant association of TSA levels with MPB and OSA. Lower TSA levels were seen in OSA cases without MPB as well as MPB cases than those with neither OSA nor MPB.