Regular use of sunscreen on vitamin D levels

Is vitamin D deficiency to blame for the asthma epidemic?

“…Serum 25(OH)D is the major circulating metabolite of vitamin D and reflects input from cutaneous synthesis and dietary intake. Because cutaneous synthesis of vitamin D is easily affected by behaviors such as time spent indoors, clothing, 16 and sunscreen use, 17 inadequate dietary intake of this vitamin significantly magnifies the problem of deficiency.…”

Sun protection and low levels of vitamin D: are people concerned?

“…Participants' mean serum 25-(OH) Vitamin D was 69.1 nmol/l (range, 12.2-174.5), with 8% of participants at or below 38 nmol/l and 23.4% at or below 50 nmol/l [13]. Previous studies have concluded that sun protection, especially regular use of sunscreen, does not substantially diminish vitamin D synthesis [14], although the results have been discrepant [15] and questioned [16].…”

An interesting D-lemma: what is all the excitement about vitamin D?

“…38 The seasonal variation in vitamin D levels (lower in winter and higher in summer) negatively correlates with disease activity both in RA and SLE. 22,24,39 Other diseases Vitamin D deficiency has also been associated with various other diseases, including multiple sclerosis, 40 asthma, 41 schizophrenia, 42 gastrointestinal and liver disease 43 and dementia. 44 …”