Glutathione - Master Antioxidant: Neutralizes harmful free radicals and toxins
HSA and FSA cards may work depending on your plan
It depends on the specific shot
Groups at higher risk of deficiency include older adults (due to reduced stomach acid production), people following vegan or strict vegetarian diets (as B12 is naturally found almost exclusively in animal products), individuals with pernicious anaemia or other malabsorption conditions, those taking certain medications such as metformin or proton pump inhibitors long-term, and people with significant nitrous oxide exposure (including recreational use), which can inactivate B12 in the body
PMID 24725840
both are also, by construction, divorced from the systemic environment of a real scalp no circulating androgens, no immune system, no vascular remodeling, no long-term cycling