Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Greens blends, which typically contain a mix of powdered vegetables, grasses, algae, and sometimes fruits or herbal extracts, have a longstanding history in traditional wellness practices for general health support, including boosting immunity and preventing colds. The tradition stems largely from the understanding that diets rich in a variety of plant-based foods—such as those found in greens blends—provide essential vitamins, minerals, antioxidants, and phytonutrients that help maintain a healthy immune system. For centuries, various cultures have recommended consuming green vegetables and herbal mixtures during cold and flu seasons, although the specific formulation of modern "greens blends" is a recent innovation.

While modern research does indicate that certain nutrients often found in greens blends—like vitamin C, vitamin A, and some polyphenols—can play a role in immune function, there is limited direct scientific evidence that consuming proprietary greens blends specifically prevents colds. Most supporting evidence comes from broader studies on diets high in fruits and vegetables rather than on these blends themselves. Nonetheless, their use for cold prevention is justified by traditional beliefs and dietary recommendations, though not strongly substantiated by rigorous clinical research specific to greens blends.

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