Prepare for the Winter: Get your Supply of Vitamin D Supplements
Figure 1: In Great Britain Vitamin D3 supplementation appears indicated at least in the winter month A recent study by researchers ( Webb. 2010 ) from the School of Earth Atmospheric and Environmental Sciences at the University of Manchester highlight the importance of maintaining "late-summer 25-OH(D3) levels" throughout the winter month. In their investigation among 125 white Caucasians aged 20-60 years in Greater Manchester they found: Dietary vitamin D remained low in all seasons (median 3.27 mug/day, range 2.76-4.15) while personal UV exposure levels were high in spring and summer, low in autumn and negligible in winter . Mean 25(OH)D levels were maximal in September (28.4 ng/mL; 28% optimal, zero deficient (< 5 ng/mL)), and minimal in February (18.3 ng/mL; 7% optimal, 5% deficient). A February 25(OH)D level of 20ng/mL was achieved following an average late summer level of 30.4 (25.6 to 35.2) and 34.9 (27.9 to 41.9) ng/mL in women and men, respecti...