Synopsis

Source of validity: Traditional
Rating (out of 5): 1

The blackboard tree (Alstonia scholaris) has a longstanding role in traditional medicine systems across South and Southeast Asia. In Ayurveda, Unani, and traditional Chinese medicine, various parts of the tree—including its bark and leaves—have been used for a range of ailments, though its primary traditional uses tend to focus on respiratory disorders, fevers, and as an anti-malarial. There is limited documentation in ethnobotanical records suggesting the use of blackboard tree for supporting circulation or treating poor circulation. When such uses are mentioned, they are typically based on the tree’s reputed effects on general vitality, blood purification, or as a tonic, rather than direct effects on the circulatory system.

From a scientific perspective, research has mainly focused on the anti-inflammatory, antimalarial, and antimicrobial properties of Alstonia scholaris. There is a lack of robust clinical or preclinical studies specifically addressing its effects on blood circulation or vascular health. Thus, while there is some traditional precedent for its use in supporting general health (which may be interpreted broadly as including circulatory health), there is minimal direct evidence—either traditional or scientific—linking the blackboard tree as a specific treatment for poor circulation. Therefore, the evidence base for this particular use is weak and should be approached with caution.

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