The GLP-1 receptor agonist class began with compounds like liraglutide and exenatide, targeting only the GLP-1R
3 RGN-259 Phase 3 Trial in Neurotrophic Keratopathy Sosne et al., International Journal of Molecular Sciences (2022) This Phase 3 randomized, placebo-controlled, double-masked clinical trial evaluated topical 0.1% RGN-259 (full-length recombinant T4 ophthalmic solution) in patients with neurotrophic keratopathy
Testing has revealed contamination rates between 12-58%, with 30% of products containing incorrect amino acid sequences and 65% exceeding endotoxin safety thresholds
The substitution wouldn't address the same research question
In short, B12 injections work, but differently based on your starting point: For those with low levels
I recommend lipotropic injections to those looking for extra support in their fitness or weight-loss journey, but as always, consult with a healthcare provider first