Leptospermum scoparium, commonly known as manuka, has a history of use in traditional medicine for wound healing, but its modern application for scratches and abrasions is increasingly supported by scientific evidence. The primary product derived from this plant is manuka honey, which has been studied for its antimicrobial and wound-healing properties. Several laboratory and clinical studies have demonstrated that manuka honey exhibits significant antibacterial activity, particularly against antibiotic-resistant pathogens such as Staphylococcus aureus and Pseudomonas aeruginosa. This activity is primarily attributed to the presence of methylglyoxal (MGO) in the honey.

Clinical trials and case reports have shown that topical application of manuka honey can promote healing of minor wounds, reduce infection rates, and support tissue regeneration. The honey’s high sugar content creates an osmotic effect that helps draw moisture out of the wound environment, inhibiting microbial growth, while its anti-inflammatory properties can reduce local inflammation and pain. International guidelines, such as those from the National Institute for Health and Care Excellence (NICE, UK), acknowledge manuka honey as a suitable dressing for certain wounds.

However, while laboratory and clinical evidence is substantial for honey derived from Leptospermum scoparium, direct studies on extracts from the plant itself (other than honey) are limited. Thus, the evidence rating is moderate (3/5), reflecting good support for manuka honey but less for other plant-derived preparations.