Malabar nut (Justicia adhatoda), also known as Vasaka, has a long history of use in traditional Ayurvedic and Unani medicine for supporting respiratory health, particularly for conditions involving the bronchial system, such as asthma and bronchitis. The leaves contain alkaloids like vasicine and vasicinone, which have been studied for their bronchodilatory, expectorant, and anti-inflammatory effects.

Scientific studies have provided some validation for these traditional uses. Research shows that vasicine exhibits bronchodilatory activity in animal models, relaxing bronchial smooth muscle and facilitating easier breathing. Several in vitro and in vivo studies have demonstrated that extracts of Malabar nut can reduce airway resistance and improve mucociliary clearance. Additionally, the plant’s anti-inflammatory and antimicrobial properties may help reduce symptoms associated with bronchial infections and inflammation.

However, while preclinical studies are promising and support the rationale for its use in respiratory conditions, high-quality clinical trials in humans are limited. As a result, the evidence base is moderate rather than robust, but it is sufficient to support ongoing interest in Malabar nut for bronchial system support. Malabar nut is often used as an ingredient in herbal syrups and formulations targeting coughs, asthma, and bronchitis.