How effective are natural remedies like zinc, echinacea, and vitamin C?
Some studies show that zinc nasal sprays help cut a cold’s severity and duration. The theory? Zinc sprays may coat the cold virus and prevent it from attaching to nasal cells where they enter the body. But other studies show that zinc is no more effective than placebo. Recent, well-done studies on echinacea show that it is not effective in preventing colds. However, in one study, 120 people with cold-like symptoms took 20 drops of echinacea every two hours for 10 days and had briefer colds than others. As for vitamin C’s effects, a recent survey of 65 years’ worth of studies found limited benefit. The researchers found no evidence that vitamin C prevents colds. However, they did find evidence that vitamin C may shorten how long you suffer from a cold. One large study found that people who took a vitamin C megadose — 8 grams on the first day of a cold — shortened the duration of their colds. To prevent colds the natural way, it’s best to make sure you’ve got a well-nourished immune sy
