Health Hotline Magazine | October 2019

VITAMIN D REDUCES RISK OF RESPIRATORY TRACT INFECTIONS

A recent analysis published in the British Medical Journal found that vitamin D has a protective effect against acute respiratory tract infections like the common cold. The analysis examined a total of 25 randomized controlled trials that included more than 11,000 participants. All participants in the studies were administered oral vitamin D3 and their baseline vitamin D levels were recorded. After examining the data, the researchers found that vitamin D supplementation reduced the risk of respiratory tract infection among all participants, with the strongest effect seen in those with vitamin D deficiency (less than 25 nmol/L) at baseline. Additionally, daily or weekly vitamin D supplementation was protective while large single doses were not. Daily doses ranged from 880 IU to 2,000 IU. To date, this is the largest study of its kind examining vitamin D3 levels and respiratory tract infections and the results highlight the important role that vitamin D3 supplements play in immune support. The researchers concluded by saying that the results of this study add to the body of evidence that support public health measures to improve vitamin D status, particularly in those with vitamin D deficiency.

Vitamin D supplementation reduced the risk of respiratory tract infection among all participants

ELDERBERRY EFFECTIVE AGAINST COLD & FLU SYMPTOMS

A recent meta-analysis of randomized-controlled clinical trials assessed the effectiveness of black elderberry for cold or flu symptoms. After reviewing the studies, the researchers concluded that elderberry supplementation at the onset of symptoms can significantly reduce the duration and severity of upper respiratory symptoms. The effects of elderberry were more beneficial for the flu, but benefits were also seen for those with the common cold. Black elderberry, also known as Sambucus, contains plant compounds known as anthocyanins which have been shown to have antiviral activity and to support healthy immune function. Every year millions of people in the U.S. are infected with influenza, also known as the flu. Additionally, the average adult experiences two to three cases of the common cold while the average child experiences five to seven cases each year. Colds and flu are commonly treated with over-the-counter (OTC) drugs, but questions about safety and efficacy of these drugs has been called into question, especially for children. Prescription drugs like antibiotics are also routinely given, despite warnings that antibiotics are not effective for viral infections like colds and the flu. The prevalence of cold and flu cases, in addition to concerns regarding medications, present the need for safe and effective options for upper respiratory symptoms. With the current concerns regarding OTC drugs and antibiotic misuse, elderberry offers a safe and effective alternative for upper respiratory cold and flu symptoms.

elderberry supplementation at the onset of symptoms can significantly reduce the duration and severity of upper respiratory symptoms

References available upon request.