Synopsis

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

Pau d'arco (Tabebuia impetiginosa) has a long history of traditional use in South American herbal medicine, particularly among indigenous peoples in the Amazon. It is most often used as an herbal remedy for infections, inflammation, and as an immune system stimulant. Its application for swollen lymph nodes or glands is rooted in its traditional use for conditions thought to involve infection or "toxins," such as colds, flu, or skin infections—situations in which lymph nodes can become enlarged.

The bark of pau d'arco contains compounds such as lapachol and beta-lapachone, which have shown antimicrobial and anti-inflammatory properties in laboratory studies. However, there is minimal direct scientific evidence supporting its effectiveness specifically for swollen lymph nodes or glands. Most references to its use for this purpose are anecdotal or based on ethnobotanical traditions rather than clinical trials.

In summary, the use of pau d'arco for supporting lymphatic health or treating swollen lymph nodes is primarily justified by tradition rather than robust scientific evidence. While there is some in vitro evidence for its antimicrobial and anti-inflammatory actions, clinical research is lacking. Users should exercise caution, as pau d'arco may interact with medications and can cause side effects at high doses.

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