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Serum Vitamin D Concentration ≥75 nmol/L Is Related to Decreased Cardiometabolic and Inflammatory Biomarkers, Metabolic Syndrome, and Diabetes; and Increased Cardiorespiratory Fitness in US Adults

Authors
  • Ganji, Vijay1
  • Tangpricha, Vin2
  • Zhang, Xu
  • 1 Human Nutrition Department, College of Health Sciences, QU Health, Qatar University, Doha P.O. Box 2713, Qatar
  • 2 Atlanta VA Medical Center, Decatur, GA 30300, USA
Type
Published Article
Journal
Nutrients
Publisher
MDPI AG
Publication Date
Mar 10, 2020
Volume
12
Issue
3
Identifiers
DOI: 10.3390/nu12030730
PMID: 32164233
PMCID: PMC7146199
Source
PubMed Central
Keywords
License
Green

Abstract

A serum vitamin D [25-hydroxyvitamin D, 25(OH)D] concentration of ≥75 nmol/L is recommended for optimal health. We investigated the relationship between serum 25(OH)D and metabolic syndrome (MetS), diabetes, cardiometabolic biomarkers, and cardiorespiratory fitness (CRF) in US adults using clinical cut points recommended by health organizations. Data from USA’s National Health and Nutrition Examination Surveys were used. Prevalences and likelihood of having MetS and diabetes according to clinical cut points for serum 25(OH)D (<30 nmol/L, 30-<50 nmol/L, 50-<75 nmo/L, and ≥75 nmol/L) were determined with multivariate logistic regression. Relations between serum 25(OH)D and various cardiometabolic biomarkers, CRF, MetS, and diabetes were tested using multivariable adjusted regression. Prevalence of MetS and diabetes were significantly lower in individuals with serum 25(OH)D ≥75 nmol/L (MetS, 21.6%; diabetes, 4.1%) compared to those with 25(OH)D <30 nmol/L (MetS, 45.5%; diabetes, 11.6%) ( p < 0.0001). Individuals with serum 25(OH)D ≥75 nmol/L had significantly lower waist circumference ( p < 0.0001), C-reactive protein ( p = 0.003), glycated hemoglobin ( p < 0.0002), fasting triglycerides ( p < 0.0001), total homocysteine ( p < 0.0001), and insulin resistance ( p = 0.0001) and had significantly higher HDL-cholesterol ( p < 0.0001) and maximal oxygen uptake (marker for CRF) ( p < 0.0009) compared to those with 25(OH)D <30 nmol/L. In conclusion, serum 25(OH)D ≥75 nmol/L is associated with positive indicators related to cardiometabolic diseases in US adults.

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