Vitamin D levels INCREASED in Korea during lockdown (supplementation) – Nov 2022

Changes in Vitamin D Status in Korean Adults during the COVID-19 Pandemic

Nutrients . 2022 Nov 17;14(22):4863. doi: 10.3390/nu14224863.
Ji-Young Kwon 1 , Sung-Goo Kang 1

The aim of this study was to investigate changes in 25(OH)D (25-hydroxyvitamin D) levels and in the vitamin D status of Korean adults before and during the coronavirus disease (COVID-19) pandemic. This study compared serum 25(OH)D levels before and after the pandemic in 1483 adults aged 19 years and older who were screened at a university hospital. Subjects were selected only from participants tested in the same season before and after the pandemic. The pre-COVID-19 testing period was from 1 March 2018 to 31 November 2019; the testing period in the COVID-19 era was from 1 June 2020 to 31 November 2021. The mean 25(OH)D level for all participants was

  • 21.4 ± 10.2 ng/mL prior to the outbreak of COVID-19, which
  • increased to 23.6 ± 11.8 ng/mL during the COVID-19 lockdown period (p <; 0.001).

The increase was particularly dramatic in elderly females (28.8 ± 12.3 ng/mL to 37.7 ± 18.6 ng/mL, p = 0.008).
The prevalence of vitamin D deficiency decreased in both males (48.4% to 44.5%, p = 0.005) and females (57.0% to 46.0%, p <; 0.001). In conclusion, 25(OH)D levels in Korean adults increased during the COVID-19 era, and the prevalence of vitamin D deficiency decreased accordingly.
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