b12 injections vs pills Vitamin vs. Supplements: Which is Right for You? B12 Injections vs Oral Supplements:

In addition, the analgesic effect of melatonin is mediated through activation of supraspinal sites, inhibition of spinal nociception, and modulation of various neurobiological systems, including GABAergic, opioid, and glutamatergic systems [65]

Injections are more effective than oral supplements because they bypass the digestive system

Vitamin B12 injections can help a deficiency, but a person with an average B12 level can replete himself by not taking supplements and eating foods rich in B12

While Vitamin B12 can be obtained from dietary sources such as meat, fish, dairy products, and fortified cereals, some individuals may have difficulty absorbing it due to medical conditions or dietary restrictions