The Bigger Concern: Leaving a Deficiency Untreated When weighing the minimal risks of B12 injections, it helps to consider the well-documented risks of an untreated B12 deficiency
A large-scale study involving over 2,400 patients with type 2 diabetes found that the majority of participants who began GLP-1 agonist treatment experienced weight loss over a 72-week period
T2DM itself is known to disrupt the gut microbiome, often leading to reduced diversity and a decline in beneficial genera like Bifidobacterium, Bacteroides, and Faecalibacterium, with increases in potentially harmful genera such as Ruminococcus, Fusobacterium, and Blautia
For hair growth specifically, GHK-Cu activates several key processes
Monthly B12 injections must be administered under proper medical supervision [20]