Scots Pine (Pinus sylvestris) has a longstanding history in traditional herbal medicine, particularly in Europe, for supporting the respiratory or bronchial system. Traditionally, preparations from Scots Pine needles, essential oil, or buds have been used as remedies for coughs, bronchitis, and congestion. Historical sources and folk medicine practices cite the inhalation of pine vapors or use of pine needle teas as natural expectorants and decongestants. The rationale behind its use is largely based on the presence of volatile oils, such as alpha-pinene and other terpenes, which are thought to have mild antiseptic and anti-inflammatory properties.

However, scientific validation for these effects is limited. While some in vitro and animal studies suggest that pine essential oils can have antimicrobial and anti-inflammatory effects, there is a lack of robust clinical trials specifically evaluating the efficacy of Scots Pine for bronchial or respiratory conditions in humans. Most evidence remains anecdotal or rooted in traditional practice rather than modern scientific research. Therefore, while the traditional use is well documented, the strength of evidence supporting the efficacy of Scots Pine for bronchial support is modest at best, warranting a score of 2 out of 5 for evidence.