buy injectable b12 for humans Cyanocobalamin Injection, 1000 mcg/mL 1mL Vial Rx only Provides 5 Vitamin B12 Injections | Skin
Description
Injections deliver vitamin B12 directly into the muscle, bypassing the digestive system

This does not mean AHK-Cu is ineffective

Who might benefit from Vitamin D injections

Notation of interest: Methylcobalamin B12, is often considered beneficial for individuals with Methylenetetrahydrofolate reductase (MTHFR) gene mutation
Integration with diet, exercise, and other therapies maximizes outcomes

The immune reaction to disease depends on fast replication of cells, which itself depends on adequate availability of B12 and folate