A scientist on the forum tells us that the B12 molecule is too large to enter through any skin
No human clinical trials have evaluated AOD-9604 for osteoarthritis yet, so discuss the current evidence honestly with your provider before pursuing this specific application
The latter concentration makes measurement easier: 0.3ml equals 300mcg, 0.4ml equals 400mcg, and so on
Experimental research is an earlier stage
Preclinical studies in rodents have demonstrated reductions in fat mass, improved insulin sensitivity, and increased metabolic rate without significant changes to food intake (Neelakantan et al., 2019)
In short, B12 injections work, but differently based on your starting point: For those with low levels