Synopsis

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

Morinda citrifolia, commonly known as noni, has a long history of use in traditional medicine across Polynesia, Southeast Asia, and other tropical regions. Traditionally, various parts of the morinda plant—especially its fruit and leaves—have been used to treat respiratory ailments, including colds and flu-like symptoms. The rationale for its use is often based on its reputed ability to boost the immune system and its perceived “cooling” effect in traditional healing systems. Some in vitro (test tube) studies suggest that extracts of morinda possess antiviral properties, including activity against certain viruses. However, clinical studies in humans are extremely limited, and there is insufficient evidence to definitively support its effectiveness for treating or preventing the common cold. Most usage for this purpose is rooted in traditional practice rather than robust scientific validation. While morinda's phytochemical constituents—such as iridoids, flavonoids, and polysaccharides—are thought to contribute to its purported health benefits, including potential immune modulation, more rigorous clinical trials are needed to establish its efficacy and safety for cold treatment. In summary, the use of morinda for colds is primarily supported by tradition and preliminary laboratory studies, but lacks strong clinical evidence.

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