Evidence supporting the use of: Elderberry
For the health condition: Congestion (lungs)

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Synopsis

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

Elderberry (Sambucus nigra) has a long history of traditional use in herbal medicine, particularly for respiratory ailments such as congestion, colds, and flu-like symptoms. Folk medicine across Europe and North America has employed elderberry preparations—including syrups, teas, and extracts—to help clear mucus and ease breathing discomfort associated with upper respiratory tract infections. The purported mechanism is elderberry's potential to reduce inflammation in the mucous membranes and stimulate immune responses, which may indirectly alleviate symptoms like congestion.

However, while there is scientific interest in elderberry’s antiviral and immune-modulating properties—especially its role in shortening the duration of influenza symptoms—direct scientific validation of its effectiveness specifically for lung congestion is limited. Most clinical trials have focused on general cold and flu symptom relief rather than congestion of the lungs or lower respiratory tract. Some laboratory and animal studies have shown that elderberry extracts can reduce the replication of certain viruses and may influence cytokine production, but these results do not directly translate to relief from lung congestion in humans.

In summary, elderberry’s use for lung congestion is primarily justified by tradition, with only weak or indirect scientific support. While it may offer mild symptomatic relief, robust clinical evidence specifically targeting lung congestion is lacking.

More about elderberry
More about Congestion (lungs)

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