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Anais Brasileiros de Dermatologia
On-line version ISSN 1806-4841
MAIA, Marcus; MAEDA, Sergio Setsuo and MARCON, Carolina. Correlation between photoprotection and 25 hydroxyvitamin D and parathyroid hormone levels. An. Bras. Dermatol. [online]. 2007, vol.82, n.3, pp. 233-237. ISSN 1806-4841. http://dx.doi.org/10.1590/S0365-05962007000300004.
BACKGROUND - The great concern about skin cancer risk led to the dissemination of photoprotection in high scale. Nowadays the association of this recommendation and the risk of develop hypovitaminosis D is discussed. OBJECTIVE - To evaluate vitamin D storage in patients submitted to sun protection. METHODS - The levels of 25-hydroxyvitamin D (25OHD) and parathyroid hormone (PTH) were evaluated in groups of individuals living in the city of São Paulo who received or not orientation about photoprotection. RESULTS - Significant differences in 25OHD levels were found between the groups, being higher in the photoexposed group (35.40 ng/mL [21.86-72.20]) as compared to the photoprotected group (29.20 ng/mL [23.10-45.80]). There was also difference in PTH levels, being higher in the photoexposed group (29.80 pg/mL [18.98-73.94]) in comparison to the photoprotected group (19.24 pg/mL [8.06-66.18]). CONCLUSIONS - Despite these differences, there were no individuals presenting vitamin D deficiency in this sample and PTH levels were within normal range. The routine solar ultraviolet radiation was enough to promote appropriate synthesis of 25OHD.
Keywords : Osteomalacia; Parathyroid hormone; Skin neoplasms; Sunscreening agents; Vitamin D.