The National Institutes of Health recommends anyone over 50 take dietary supplements or eat fortified foods because their bodies are more likely able to absorb B12 from those sources
One would have to sample Reddit posts from individuals not on these medications or using other medications to see if they had these symptoms
If you have any doubts about the amount of work necessary to bring that to reality, I strongly encourage you to look at the FDA application
This class of drugs, called GLP-1 (glucagon-like peptide-1) agonists, are being investigated for an array of side effects, as they are used to treat diabetes and help with weight loss
Berg, G., Barchuk, M., Lobo, M
L-carnitine is a naturally occurring compound synthesised in the body from the amino acids lysine and methionine, primarily in the liver and kidneys