It stems from a shift in medicine towards more personalized, regenerative treatments
Scriver, A
Some of our more popular IM Vitamin Shots: Level 1 Injections Vitamin B12: Energy metabolism, mood, and blood health B-Complex: Energy, stress, metabolism, and immune support L-Glutamine: Helps with muscle soreness and recovery, improves gastrointestinal and immune function, may help with leaky gut and ulcers, supports brain health (addiction, anxiety depression, Alzheimer's, seizure disorders, and more), promotes muscle growth, supports metabolic and heart health, great as a chemotherapy adjunct to support gut lining permeability
That, in plain English, is the whole story