Winter vitamin D supplementation did not reduce upper respiratory tract infections or symptoms

2009 ◽  
Vol 14 (3) ◽  
pp. 185-185
Keyword(s):  
Vitamin D ◽  
Respiratory Tract ◽  
Respiratory Tract Infections ◽  
Vitamin D Supplementation ◽  
Upper Respiratory Tract Infections ◽  
Upper Respiratory Tract ◽  
Upper Respiratory ◽  
Tract Infections

No Association between Vitamin D and Acute Respiratory Tract Infections Amongst Elite New Zealand Rugby Players and Rowers

2018 ◽  
Vol 88 (1-2) ◽  
pp. 8-15 ◽  
Author(s):  
Luke Scullion ◽  
Dane Baker ◽  
Phillip Healey ◽  
Antony Edwards ◽  
Thomas Love ◽  
...  
Keyword(s):  
Vitamin D ◽  
Respiratory Tract ◽  
Respiratory Tract Infections ◽  
Acute Respiratory Tract Infection ◽  
Upper Respiratory Tract Infections ◽  
Upper Respiratory Tract ◽  
Acute Respiratory Tract Infections ◽  
Upper Respiratory ◽  
Tract Infections ◽  
Rugby Players

Abstract. Upper respiratory tract infections are the most common infections reported by elite athletes. Low vitamin D status has been associated with an increased risk of upper respiratory tract infections. The aim of this study was to investigate associations between serum 25-hydroxyvitamin D (25(OH)D), salivary immunoglobulin A (S-IgA) concentrations, and acute respiratory tract infections (colds/flu) (ARI) in elite rowers and rugby players. A total of 53 (23 rugby players, 30 rowers) elite New Zealand athletes volunteered to participate in an interview, and to provide a blood and a saliva sample. Testing occurred twice, 6 months apart. Athletes’ serum 25(OH)D concentrations and s-IgA levels were both significantly higher in summer, 108.9 (CI 102.8, 115.4) nmol/L, than in winter, 86.8 (CI 81.8, 92.1) nmol/L (p < 0.01, p = 0.028). The occurrence of an acute respiratory tract infection did not differ significantly between the time points (p = 0.322). However, ARI duration was significantly longer in winter than in summer (6.9 ± 4.3 days vs 4.8 ± 3.0 days; p = 0.044). There were no significant correlations between athletes’ 25(OH)D levels and their s-IgA levels (p > 0.05) nor with acute respiratory tract infection occurrence (p > 0.05) nor duration (p > 0.05) in summer or winter. These findings suggest there may not be any associations between serum 25(OH)D concentrations and acute respiratory tract infections in this population. However, this null finding may be attributed to the high vitamin D concentrations seen in these athletes.

Vitamin D, innate immunity and upper respiratory tract infection

2010 ◽  
Vol 124 (5) ◽  
pp. 465-469 ◽  
Author(s):  
J Bartley
Keyword(s):  
Vitamin D ◽  
Innate Immunity ◽  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infections ◽  
Upper Respiratory Tract Infections ◽  
Upper Respiratory Tract ◽  
Vitamin D Levels ◽  
Upper Respiratory ◽  
Tract Infections

AbstractIntroduction:At the turn of the twentieth century, ultraviolet light was successfully used to treat tuberculosis of the skin. Upper respiratory tract infections had been inversely associated with sun exposure. During the last decade, basic scientific research demonstrated that vitamin D has an important anti-infective role.Method:Review of the relevant literature on the influence of vitamin D on innate immunity and respiratory tract infection.Results:Vitamin D is involved in the production of defensins and cathelicidin – antimicrobial peptides that provide a natural defence against potential microbiological pathogens. Vitamin D supplementation increases cathelicidin production. Low vitamin D levels are associated with an increased incidence of upper respiratory tract infections.Conclusions:Vitamin D appears to play an important role in the regulation of innate immunity in the upper respiratory tract. Optimal vitamin D levels and appropriate dosing schedules have yet to be determined.

Sign in / Sign up

Export Citation Format

Share Document