Beyond prescription medications, some dietary supplements contain amino acid blends or collagen peptides marketed for metabolism, though these are not equivalent to pharmaceutical peptides
If estrogen is high, dose reduction often helps
SubQ delivery makes this easier because the smaller needles and lower pain make frequent injections practical
Importantly, persistently high serum B12 in the absence of supplementation should prompt GP assessment, as it may indicate underlying disease processes
Body-weight changes do not reveal long-term safety
These were counteracted/attenuated muscle disabilities induced by spinal cord injury [76,77], stroke [38], concussive brain trauma [78], nerve transection [79], and neurotoxin application (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) and cuprizone, mimicking Parkinsons disease in mice and multiple sclerosis in rats) [69,80]