fda.gov U.S
Knocking out the preproghrelin gene in mice does not seem to affect their size, growth rate, food intake, body composition, and reproduction, indicating that proghrelin products (acyl- or desacyl-ghrelin, obestatin) are not dominantly and critically involved in mouse viability, appetite regulation, and fertility (347), although subtle reductions in the amplitude of secretory GH peaks can be detected in these knockout mice during their youth: these differences recede with aging (348)
Carpenter EL, Wyant MB, Indra A, Ito S, Wakamatsu K, Merrill GF, et al
However, your provider will evaluate your medication list to ensure there are no interactions
The best type of B12 depends on your diet, metabolism, and symptoms