Large reviews and clinical statements note that B12 injections do not consistently improve energy, mood, or weight loss in non-deficient individuals
(PubMed) Wang H, Li L, Qin LL, Song Y, Vidal-Alaball J, Liu TH
Some algae that are advertised as a source of B12, such as spirulina, in fact, contain these analogues (Rizzo et al., 2016)
The practical result is that the body starts preferring fat as its primary fuel source even during moderate activity
Many patients experience fatigue, nausea, or reduced appetite while on GLP-1 or GIP + GLP-1 peptides
Having a B12 deficiency for a long period of time can make you more at risk for health conditions such as dementia and infertility, so it is important to make sure that your levels are properly balanced