Lesson plan
Lapachol
Lapachol is a natural phenolic compound isolated from the bark of the lapacho tree. This tree is known botanically as Handroanthus impetiginosus, but was formerly known by various other botanical names such as Tabebuia avellanedae. Lapachol is also found in other species of Handroanthus. Lapachol is usually encountered as a yellow, skin-irritating powder from wood. Chemically, it is a derivative of vitamin K. Once studied as a possible treatment for some types of cancer, the levels of lapachol required for cancer treatment are considered too toxic for use as an in vivo chemotherapy treatment. In 2024, A clinical trial published in the Journal of Cosmetic Dermatology determined that lower concentrations of lapachol were safe and efficacious in Facial Redness Reduction.
Article summary
Lapachol is a natural phenolic compound isolated from the bark of the lapacho tree. This tree is known botanically as Handroanthus impetiginosus, but was formerly known by various other botanical names such as Tabebuia avellanedae. Lapachol is also found in other species of Handroanthus. Lapachol is usually encountered as a yellow, skin-irritating powder from wood. Chemically, it is a derivative of vitamin K. Once studied as a possible treatment for some types of cancer, the levels of lapachol required for cancer treatment are considered too toxic for use as an in vivo chemotherapy treatment. In 2024, A clinical trial published in the Journal of Cosmetic Dermatology determined that lower concentrations of lapachol were safe and efficacious in Facial Redness Reduction.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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