Evidence supporting the use of: Pentacyclic triterpenoids (unspecified)
For the health condition: Acne

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Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Pentacyclic triterpenoids are a class of naturally occurring compounds found in many medicinal plants, including Centella asiatica, Glycyrrhiza glabra, and Olea europaea. While these compounds have a long history of use in traditional medicine for various skin ailments, there is a growing body of scientific evidence supporting their potential benefit in acne management. Studies have shown that pentacyclic triterpenoids such as asiatic acid, ursolic acid, and oleanolic acid exhibit anti-inflammatory, antimicrobial, and antioxidant properties. These activities are relevant to acne pathogenesis, which involves inflammation and bacterial overgrowth (notably Cutibacterium acnes).

In vitro studies demonstrate that certain pentacyclic triterpenoids can inhibit the growth of C. acnes and reduce pro-inflammatory cytokine production. A few small clinical trials and topical formulations containing triterpenoid-rich plant extracts (e.g., Centella asiatica) have reported improvements in mild-to-moderate acne, primarily attributed to reduced lesion counts and erythema. However, the evidence is limited by small sample sizes, lack of standardized extract concentrations, and short study durations. No large-scale, high-quality randomized controlled trials have definitively established their efficacy for acne treatment.

In summary, while some scientific evidence suggests pentacyclic triterpenoids may be useful for acne, the overall strength of the evidence is moderate to low. More rigorous clinical studies are needed to confirm their efficacy and safety for this indication.

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