Higher Vitamin D in seniors is associated with lower Inflammation (CRP) – June 2023

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Vitamin D status & associations with inflammation in older adults

PLoS One. 2023; 18(6): doi: 10.1371/journal.pone.0287169
Eamon Laird, Conceptualization, Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft,corresponding author# 1 , 2 ,* Aisling M. O’Halloran, Methodology, Writing – review & editing,# 3 Anne M. Molloy, Funding acquisition, Resources, Writing – review & editing,# 2 Martin Healy, Methodology, Writing – review & editing,# 2 Nollaig Bourke, Writing – review & editing,# 2 and Rose Anne Kenny, Funding acquisition, Writing – review & editing# 2 , 3

Research studies have observed associations of vitamin D with inflammation but data in representative older adult studies is lacking. We aimed to investigate the association of C-reactive protein (CRP) with vitamin D status in a representative sample of the older Irish population. The concentrations of 25-hydroxyvitamin D ( 25(OH)D) and CRP was measured in 5,381 community dwelling Irish adults aged ≥50 years from the Irish Longitudinal Study on Ageing (TILDA). Demographic, health and lifestyle variables were assessed by questionnaire and categorical proportions of CRP were generated by vitamin D status and age. Multi-nominal logistic regression was used to investigate the association of 25(OH)D and CRP status. The prevalence (mean; 95% confidence interval (95% CI)) of normal CRP status (0–5 mg/dL) was 83.9% (82.6–85.0%), elevated status (5–10 mg/dL) 11.0% (9.9–12.0%) and high status (>10 mg/dL) was 5.1% (4.5–5.8%). Mean (95% CI) CRP concentrations were lower in those with normal vs. deficient 25(OH)D status (2.02 mg/dL (1.95–2.08) vs. 2.60 mg/dL (2.41–2.82); p<0.0001). In a logistic regression analysis, those with insufficient or sufficient 25(OH)D status were less likely to have a high CRP status compared to those with deficient 25(OH)D status (insufficient: coefficient (CE) -0.732, 95% CI -1.12–0.33, p<0.0001; sufficient: CE -0.599, 95% CI -0.95–0.24, p = 0.001). In conclusion older adults with deficient vitamin D status had higher levels of inflammation as measured by CRP. Given that inflammation is an important pathological driver of chronic diseases of ageing, and that emerging evidence suggests that vitamin D therapy can reduce inflammation in some disease settings, optimising vitamin D status could represent an effective low risk/low-cost pathway to modulate inflammation in community dwelling older adults.

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VitaminDWiki – Inflammation category:

173 items total

Example studies

• Vitamin D energizes the innate and adaptive immune systems to fight lung inflammation – Sept 2022
• COVID-19 inflammation extinguished by 60,000 IU of vitamin D nanoemulsion daily for a week – RCT May 2021
• Inflammation (C-reactive protein) associated with low vitamin D in 22 diseases – April 2020
• Vitamin D reduces inflammation in critically ill patients – Sept 2020
• Inflammation is reduced by each of the following: Vitamin D, Omega-3, Diet
• How Vitamin D reduces inflammation, improves immunity and fights autoimmunity – review Dec 2018
• CYTOKINE in VitaminDWiki 12 titles as of July 2023
• 17 pages in VitaminDWiki had REACTIVE or CRP in title as of July 2023
• Little risk of infection after surgery if have more than 50 ng of vitamin D - 2014

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