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Med J Aust. 2008 Dec 1-15;189(11-12):674-5.

Does degree of baldness influence vitamin D status?

Author information

  • 1Department of Medicine, University of Auckland, Auckland, New Zealand. m.bolland@auckland.ac.nz

Abstract

OBJECTIVE:

To determine the association, if any, between male-pattern hair loss (baldness) and serum 25-hydroxyvitamin D (25-OHD) levels.

DESIGN AND PARTICIPANTS:

A cross-sectional study of 296 healthy middle-aged and older men.

MAIN OUTCOME MEASURES:

Degree of baldness was independently assessed by two researchers using the Hamilton-Norwood scale and serum 25-OHD was measured in all men.

RESULTS:

Classification of the degree of baldness by the two researchers showed a high level of agreement (kappa = 0.93). Forty-eight per cent of men had no hair loss or mild frontotemporal recession, 15% had predominant vertex loss, and 37% had significant scalp and vertex loss. After data were adjusted for potential confounding factors - including age, month of 25-OHD measurement, exercise levels, use of sunscreen, skin type and frequency of outdoor hat wearing - no significant differences in 25-OHD levels between these groups was detected (P = 0.60).

CONCLUSIONS:

The degree of baldness does not appear to influence serum 25-OHD levels. The high prevalence of baldness in older men does not explain sex differences in 25-OHD levels. Other novel hypotheses are required to help determine whether baldness serves any physiological purpose.

PMID:
19061473
[PubMed - indexed for MEDLINE]
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