Immune support continues to be one of the stronger segments in the natural health marketplace. Demand for some immune system products has declined slightly in the past year or two. For example, Euromonitor reported that the growth rate of functional foods and beverages intended to provide immune support slipped a few points in 2015, but still managed to surpass $50 million for the year. Immune supplement sales, meanwhile, topped $1.5 billion, according to SPINS research.
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