Amino-B Booster is a specially formulated apiary blend of free amino acids that can be mixed with Honey-B-Healthy which enhances its attractiveness to bees and prevents fermentation. As a blend of free amino acids it is assimilated rapidly, directly through the midgut to the bee hemolymph and hemocytes, then transported to the sites where protein is needed for growth of the bee, both as larvae and as adults.
Ive used amino B booster, with honey B healthy, for the past 3 years, and my overwinter survival has gone up a lot. I have made other changes, too, including adding protein supplements to winter fondant. It makes sense to feed protein and carbohydrates, not just carbs.