They can promote hair growth by (i) stimulating fibroblasts to produce vascular endothelial growth factor (VEGF) and thus promote the formation of new blood vessels around hair follicles to provide the nutrients required for growth [[19], [20], [21], [22]]
This direct delivery is why the timeline for injections is often measured in days rather than weeks, especially for someone who was deficient
Glucagon receptor agonism: Promotes energy expenditure and hepatic lipid metabolism through thermogenesis
A study found that administration of topical TB4 increased re-epithelialization by 42 percent versus saline controls
You'll need to take vitamin B12 injections depending on your situation if your deficiency is not diet-related
Unfortunately, studies on this topic have mainly focused on normalising serum B12 concentrations with oral supplementation and should be interpreted with caution since the specific goal of treatment in symptomatic B12 deficiency is alleviating symptoms, and NOT to normalize B12 concentrations in the blood
