Obstructive sleep apnea, low transferrin saturation levels, and male-pattern baldness

Area of Science:

• Andrology
• Dermatology
• Sleep Medicine

Background:

• Obstructive sleep apnea (OSA) involves intermittent hypoxia, with limited data on its link to male-pattern baldness (MPB).
• Low iron status is associated with hypoxia and hair loss, suggesting a potential connection to MPB.
• This study investigated the relationship between OSA, iron status, and MPB in men.

Purpose of the Study:

• To explore the association between obstructive sleep apnea (OSA), iron status, and male-pattern baldness (MPB).
• To determine if OSA is an independent risk factor for MPB.
• To examine the role of iron status, specifically serum transferrin saturation (TSA), in the potential link between OSA and MPB.

Main Methods:

• A cross-sectional study involving 932 men aged 46-76 years.
• Obstructive sleep apnea (OSA) diagnosed via polysomnography (apnea-hypopnea index ≥5).
• Male-pattern baldness (MPB) assessed using the Norwood-Hamilton scale (IV-VII), with serum transferrin saturation (TSA) levels measured.

Main Results:

• Obstructive sleep apnea (OSA) was present in 53% of participants, and male-pattern baldness (MPB) in 24%.
• OSA alone was not significantly associated with MPB, but a family history of hair loss combined with OSA showed a sevenfold increased risk for MPB.
• Lower serum transferrin saturation (TSA) levels were observed in participants with OSA and/or MPB compared to those without either condition.

Conclusions:

• Obstructive sleep apnea (OSA) may be a risk factor for male-pattern baldness (MPB) in men with a genetic predisposition (family history).
• Low serum transferrin saturation (TSA) levels, potentially related to hypoxia, may mediate the link between OSA and MPB.
• These findings highlight the importance of considering sleep apnea and iron status in the context of male hair loss.