4 times fewer with vitamin D deficiency in just 4 years ( Connecticut)

A Four-Year Trend in Serum 25-Hydroxyvitamin D Levels in Western Connecticut.

Conn Med. 2016 Mar;80(3):133-7.

Belsky J, Sena S, Baqai S, Dilello LC, Petrini JR.

Table 3. % Distribution of 25-OH Vitamin D Levels, 2009–2012

**
Year	< 10 ng/mL	< 20 ng/mL	< 30 ng/mL	> 100 ng/mL
2009	1.45	17.6	51.7	.14
2010	.68	14.1	48.6	.24
2011	.44	12.9	46.2	.10
2012	.30	9.9	39.0	.19	**

OBJECTIVE:

This study describes the trends in blood vitamin D levels in a regional population from 2009-2012 through a cross-sectional study design.

METHODS:

Over a four-year period (2009-2012), serum levels of 25-hydroxyvitamin D [25(OH)D] have been measured using an automated enzyme immunoassay with a steadily increasing number of tests performed each year. A total of 54700 tests were performed during this period, with a 90% increase in annual tests ordered.

RESULTS:

Mean and median serum levels of 25(OH) D showed statistically significant increases during this period. Those with 25(OH)D levels below 10 ng/mL represented 1.45% of the subjects in 2009 and 0.3% in 2012 . The decrease in the proportion of subjects with 25(OH)D levels below 20 ng/mL and below 30 ng/mL was greatest out of all the proportioned subjects. Mean and median 25(OH)D levels increased with age in males and females.

CONCLUSION:

These results likely reflect increased health awareness in Western Connecticut compared with national surveys showing a temporal decrease in 25(OH)D levels.

PMID: 27169294

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Nice to see that some people are making modest increases in Vitamin D levels

See also Vitamin D

Increased use of D category listing has items including the following

• Vitamin D use increased 3.7 X, Omega-3 increased 9 X (US 1999-2012) – JAMA Oct 2016

• Vitamin D levels increasing 7 percent per year, bones denser in Japan (probably supplementation) - June 2015

• Vitamin D supplementation in Ireland - big increase in people with 20-50 nanograms in 20 years – June 2015

• 26 X increase in Vitamin D prescriptions for youths in England in 8 years – Dec 2019

• Vitamin D in US children: those having more than 40 ng increased 60 percent (2001-2010) - Dec 2016

• Vitamin D is the most popular supplement - many studies

• 4 times fewer with vitamin D deficiency in just 4 years ( Connecticut) – March 2016

• 20X increase in vitamin D sold and 36 percent decrease in osteoporosis business in Australia – Nov 2013