Epidemiology suggests that melanin inhibits cutaneous vitamin D 3 synthesis by UVR.
Laboratory investigations assessing the impact of melanin on vitamin D production have …

• The varying epidermal melanin content that produces racial pigmentation determines the
number of photons that reach the lower (malpighian) cellular layers, where vitamin D 3 …

Background: Whether dark skin produces less vitamin D after UVB radiation than fair skin
remains controversial. Objective: To compare 25-hydroxyvitamin D [25-(OH)-D] levels after a …

Ultraviolet‐B (UV‐B) radiation increases serum vitamin D level expressed as 25‐
hydroxyvitamin D3 (25 (OH) D), but the dose–response relationship and the importance of …

Exposure of the skin to sunlight results in both tanning and vitamin D 3 production. It has
therefore been suggested that vitamin D 3 or its active metabolite 1, 25-dihydroxyvitamin D 3 …

UVB radiation increases serum vitamin D level expressed as 25-hydroxyvitamin-D 3 (25
(OH) D), but the influence of skin pigmentation, baseline 25 (OH) D level, and total …

Background Ultraviolet (UV) B radiation increases serum 25-hydroxyvitamin-D3 [25 (OH) D],
but the influence of UVA1 and UVA/narrowband UVB (UVBnb) phototherapy on serum …

Public health guidance recommends limiting sun exposure to sub-sunburn levels, but it is
unknown whether these can gain vitamin D (for musculoskeletal health) while avoiding …

BACKGROUND: Ultraviolet (UV)-B light increases vitamin D levels, but the dose response
and the effect of skin pigmentation have not been well characterized. OBJECTIVE: We …

Summary Background Ultraviolet (UV) B radiation increases serum vitamin D level
expressed as 25‐hydroxyvitamin‐D3 [25 (OH) D], but the relationship to body surface area …