Manuka Active Honey, NPA 5+, Barnes Naturals 

• Active Manuka Honey is sourced from the flowering plant species of Leptospermum that are native to Australia and New Zealand. The indigenous people from both lands have been using Manuka in their traditional medicines for centuries
• Manuka honey contains a heightened stable form of natural antibacterial activity often known as Non-Peroxide Activity (NPA)
• Active Manuka Honey is sold with varying levels of antibacterial activity, which is assigned using a rating such as Active 5+, 10+ or 15+. The scale relates to the increasing antibacterial inhibition effect of the honey on cultured bacteria (Staphylococcus aureus), in comparison to what phenol achieves

Source: Honey Corporation of Australia