Recent experience with Manuka honey with my B-major child has shown great effect on his Hb count. Omar used to take transfusions every two weeks. After using a UMF 15+ Manuka Honey, he now transfuses every three weeks.
I believe Manuka excels mostly because of two main attributes:
1- It has a high anti-bacterial activity
2- It is not micro-filtered or pasteurized (raw)
If someone would like the nutritional values alone and has no need for the immune-boosting properties, other raw honeys are available at a fraction of the cost.