Comvita is the world's largest manufacturer and marketer of premium quality UMF? Manuka Honey. The Comvita brand is well-known and trusted by retailers and consumers around the world for its high quality, effective natural health products. Comvita UMF Manuka Honey is one of the world's most trusted brands of Manuka Honey. In August 2013 there has been some confusing stories reported regarding the the quality of New Zealand Manuka Honey. We wanted to reassure you: Comvita Manuka Honey was one of the few Manuka Honeys tested by FERA* formally confirmed as true to label.