Manuka honey is derived from bees that forage on the Manuka bush (Leptospermum scoparium) and has been demonstrated to exhibit significant non-peroxide antimicrobial activity (NPA). This antimicrobial activity is in addition to the peroxide activity found in honeys that contain glucose
oxidase and is thought to be unique to Manuka honey. The sum of the peroxide activity and the non-peroxide activity is known as the total activity (TA).
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