There are some effective products on the market such as larch arabinogalactan. Larch arabinogalactan is a natural immune support supplement that has been tested in several clinical trials. A double-blind placebo-controlled clinical trial that included 204 healthy adults found that those taking larch arabinogalactan supplements were 57% more likely to stay healthy than non-users. The health measurement looked at the impact on the non-inflammatory, IgG adaptive immune response, when exposed to an immune challenge.
A Answers (2)
Michael Roizen, MD, Internal Medicine, answered
Anthony Komaroff, MD, Internal Medicine, answeredToday, it isn't too hard to find food products, packaged drinks, and even menu items that are labeled as "supporting immunity," "boosting immunity," or providing a "defense" against germs. Most of these products just contain vitamins and minerals that most people already get as part of a normal, healthy diet. In impoverished parts of the world, some people have severe vitamin deficiencies that can degrade immune function. If these folks are given vitamins, their immune function can be restored. But it is an unwarranted stretch of logic to claim that ingesting more of these vitamins will translate into better immune function.