COVID lockdowns reduced Vitamin D levels - should supplement - April 2023

Influence of Strict Lockdown on Vitamin D Deficiency in Pregnant Women: A Word of Caution

Nutrients. 2023 Apr 19;15(8):1972. doi: 10.3390/nu15081972.Nuria Agüero-Domenech 1 2, Eduardo Bernabeu 3 4, Antonio García-Valentín 3, Ana Sarrión 1, Silvia Jover 1, Javier Baranda 1, Ernesto Cortés-Castell 5, Vicente Gil-Guillén 6, María J García-Teruel 1 2

>75% of pregnant women were deficient (<20 ng) duing strict lockdown

Black bar = % <20 ng/mL

The main source of vitamin D results from skin sunlight exposure. Vitamin D deficiency (VDD) is linked to several adverse events during pregnancy. While performing a cross-sectional study with 886 pregnant women in Elda (Spain) from September 2019 to July 2020 to determine the association of VDD with gestational diabetes mellitus in relation to body mass index, a strict lockdown (SL) due to the COVID-19 pandemic was declared from 15 March 2020 to 15 May 2020. To determine if VDD prevalence in the local population of pregnant women was influenced by SL, a retrospective cross-sectional study was conducted to estimate the prevalence odds ratio (POR) for the association of VDD and SL. A crude logistic regression model was calculated, and then further adjusted by the biweekly measured vitamin D-specific UVB dose in our geographical area. The POR during SL was 4.0 (95%CI = 2.7-5.7), with a VDD prevalence of 77.8% in the quarantine period. Our results revealed that VDD prevalence in pregnant women was influenced by SL. This valuable information could guide us in future if public officials order the population to stay indoors for any given reason.
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VitaminDWiki – High Risk category contains

Those at high-risk of being Vitamin D deficient will require about 1.5X more vitamin D to restore their levels
Those who are at risk due to being obese need about 2X more vitamin D to restore their levels

22 VitaminDWiki pages had CLOTH in the title as of July 2022
16+ VitaminDWiki pages with SHIFTWORK etc in the title
10 Groups Are More Prone To Vitamin D Deficiency - 2017 - additions include: >age 55, IBD, Vegans, Depression, Headaches

See also VitaminDWiki

• 11 percent fewer COVID-19 deaths if lockdowns had allowed sunshine – Nov 2021
• Submariners need Vitamin D (no surprise) – Review March 2023
• COVID 5X more likely if in prison (low Vitamin D, etc) - Oct 2021))
• People who get little noon-day sun must supplement with Vitamin D – systematic review June 2017