Synopsis

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

Oriental arborvitae (Platycladus orientalis, also known as Thuja orientalis), has a long history of use in traditional Chinese medicine (TCM) and other East Asian medical systems. In TCM, the seeds (known as Bai Zi Ren) are primarily used for calming the spirit and nourishing the heart, but the leaves and other parts have also been employed for their purported anti-inflammatory and antimicrobial properties. There are some traditional references to the use of arborvitae in treating external conditions including eye redness or itching, often in the form of topical preparations or washes. Such uses are grounded in the TCM theory that associates eye health with the liver and the wind-heat pattern, for which anti-inflammatory herbs like arborvitae might be recommended. However, there is a lack of well-documented, direct clinical evidence supporting the efficacy of oriental arborvitae for eye conditions. Modern scientific studies have focused more on its anti-inflammatory, antioxidant, and antimicrobial properties in general, but not specifically for ocular use or relief of eye redness and itching. Therefore, while the use can be traced back to traditional practices, the evidence base is weak and mostly anecdotal, without robust clinical trials or pharmacological studies to confirm its safety and efficacy for this specific condition.

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