Synopsis

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

Blackberry (Rubus fruticosus) has a long history of use in traditional herbal medicine for the management of colds and related symptoms. Folk medicine practices in Europe and North America have employed blackberry leaves, fruit, and sometimes root infusions or syrups to soothe sore throats, reduce fever, and generally support the body during upper respiratory infections. The traditional rationale often hinges on blackberry’s astringent properties (due to tannins), its vitamin C content, and its purported ability to tone mucous membranes.

However, scientific validation for these uses is limited. There are some in vitro studies suggesting that blackberry extracts have mild antimicrobial and antiviral activities, and the fruit is known for its antioxidant content (mainly anthocyanins and vitamin C). Despite these promising properties, clinical trials specifically evaluating blackberry’s efficacy in treating or preventing colds in humans are lacking. There is no robust evidence that blackberry preparations reduce the duration or severity of colds.

In summary, blackberry’s use for colds is primarily supported by traditional use and some plausible, but unproven, mechanisms. Until more rigorous clinical studies are conducted, its role in the management of colds should be viewed as complementary and not a substitute for evidence-based therapies.

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