TY  - JOUR
T1  - VItamin d level, respiratory tract infections, and controlled trials—reply
AU  - Ginde AA, Mansbach JM, Camargo CA, Jr
Y1  - 2009/08/10
N1  - 10.1001/archinternmed.2009.247
JO  - Archives of Internal Medicine
SP  - 1443
EP  - 1444
VL  - 169
IS  - 15
N2  - 
We thank Dr Hemilä for this correspondence. The Cochrane review by Douglas et al1 supported our statement that vitamin C has a limited role in prevention and treatment of colds and concluded that the prophylactic or therapeutic use of vitamin C does not reduce the incidence or severity of colds. There was a modest reduction (approximately 12 hours) in duration of colds with prophylactic but not therapeutic use of vitamin C, but as those authors conclude, “there seems no justification for routine mega-dose vitamin C supplementation in the normal population” and “therapeutic supplementation has not been shown to be beneficial.”1

SN  - 0003-9926
M3  - doi: 10.1001/archinternmed.2009.247
UR  - http://dx.doi.org/10.1001/archinternmed.2009.247
ER  -