When it comes to anything going into your body, the source is not a detail
Both peptides are usually given as small shots under the skin
If you have known allergies or sensitivities to cobalt, vitamin B12 itself, or any additives commonly found in injection solutions, it is important to inform your provider
according to the National Academies of Sciences, Engineering, and Medicine, absorption is approximately 50% at 1 mcg but falls to roughly 1.3% at 1,000 mcg
Clinically, however, the evidence is mixed : Vitamin B12 has a well-established role in energy metabolism, especially in deficient individuals
Anemia makes you feel tired, weak, and can cause neurological problems