A new study performed at the University of Otago in Christchurch, New Zealand indicates that vitamin D might not be effective in preventing respiratory infections.
The recent study monitored 322 healthy New Zealand adults over two winter seasons, in which they either took either a 200,000 IU or 100,000 IU oral vitamin D3 supplement, or a placebo. The adults had monthly office visits, during which they were asked about symptoms, like runny nose, nasal stuffiness or sore throat, that were not the result of allergies. They were also subject to at-home nasopharyngeal swab sampling.
According to the study authors, the average number of people who took the vitamin D supplement and contracted an infection was 3.7 percent, opposed to the 3.8 percent of people who got an infection in the placebo group. The studies also concluded that there was an inconsequential difference between the placebo and test groups when it came to the number of workdays missed and the duration of symptoms.
This doesn’t mean that you should forego daily intake of of vitamin D.
“It’s very important, however, to keep in mind that this group had relatively normal levels to start with, and so this might not apply to people with lower levels, with actually a vitamin D deficiency,” said study co-author Carlos A. Camargo Jr., MD.
This corresponds to a study on Mongolian children – who originally had a vitamin D deficiency – which showed that a daily regimen of the vitamin had an impressive impact on their health.
While excess vitamin D may not be able to keep colds at bay by itself, it may prove to be beneficial when combined with other nutrients. According to the National Institute of Health (NIH), vitamin E can bolster your immune system, and a study published the American Society for Nutritional Sciences reports that vitamin E has been shown to benefit cell immunity among certain populations. The Linus Paling Institute at Oregon State notes that a steady regimen of antioxidants like vitamin C can help keep your body healthy by giving you energy by strengthening mitochondria and warding off cancer-causing free radicals.
To get your daily dose of cold-fighting vitamins, the NIH recommends regularly eating leafy greens, nuts, citrus fruits and tomatoes. You can supplement your diet with vitamins like Super C22 and Sublingual D-3 from Dr. Newton’s Naturals. Omega-3 fatty acids may also be effective in keeping you sniffle-free, which you can get a healthy daily dose of from OmegaKrill, also available from Dr. Newton’s.