Its fun to joke about secret ingredients and all, but really , the information is out there. My own recipe is always evolving. It was at least 30 years ago when I first noticed that bees would dwindle here in California's late dry summer dearth. Bees in some locations would be much stronger than others because of certain pollens that were available. So we started feeding a brewers yeast and honey mix to the bees in the worst locations in late summer and there was an improvement.I think the subs that are available now are much better than what was around then.