This issue can be approached by considering the distinct mechanisms of action of the two strategies
(7) D E Beck, W B Sweeney, and M D McCarter (2014) Prospective, randomized, controlled, proof-of-concept study of the Ghrelin mimetic ipamorelin for the management of postoperative ileus in bowel resection patients International Journal of Colorectal Disease, 2014 Dec, Volume 29 (Issue 12), Pages 1527-34
The problem is that most of these formulas lean on vague claims and stimulants rather than clear mechanisms and data
Therefore, the choice of feed source must balance enrichment efficiency, sensory quality, oxidative stability, and production performance (47)