B12 shots deliver a concentrated amount of cobalamin, a water-soluble vitamin essential for red blood cell formation, neurological function, and DNA synthesis, as detailed in the NIH fact sheet on vitamin B12
This is not a small detail
The patches may also be worn while sleeping
Shipping during extreme temperatures can damage peptides before arrival
Do not use Retinol, high-strength AHAs, and BHAs in the same routine to prevent irritation
Their biochemical systems are related, but strong human trials have not established that combined NAD+ and glutathione IV therapy produces superior energy, cognition, recovery, detox, anti-aging, or longevity outcomes compared with either treatment, oral approaches, or no treatment