best place to give yourself a b12 injection Optimal Sites for Maximum Absorption and Benefits How to Inject Vitamin B12

Research-context answer Oral absorption and injected delivery are different

Sublingual formulations (tablets or sprays placed under the tongue) are marketed as having superior absorption, but current evidence does not conclusively demonstrate that they offer significant advantages over standard oral tablets

Safety, Pharmacology, and Regulatory Science : Studying how AOD 9604 is absorbed, distributed, metabolized, and excreted in the body, as well as comparing its safety profile with that of full-length growth hormone

oral less effective due to metabolism

Other common symptoms include difficulty concentrating, memory problems, lightheadedness, or even shortness of breath with mild activity

This can actually help prevent the gaunt look sometimes associated with rapid weight loss