yeast cultures, probiotics, rumen bacteria--synonymous to some degree. B-12 is synthesized by micro-flora in the rumen and addition of B-12 is beneficial in times of stress as needs may not be met. Would guess gut candy contains cobalt also to facilitate B-12 synthesis. Am not questioning gut candy or its feasibility just explaining process. Many products aimed at the same aspect of rumen function are available and will help. There is no doubt that a healthy rumen is the basis of sound ruminant nutrition and these products are aimed at that goal.
