Trust the science, not the forum chatter
Then there is Dr
Stub your toe, and pain receptors send a clear message to your brain
National Library of Medicine: Indeed, DNA synthesis is impaired by low vitamin B12, which hampers the activation of folate and, as a result, decreases normal red blood cell production, impairing oxygen delivery [62] WebMD indicates, if you have vitamin B12 deficiency, you could become anemic
If your symptoms persist for more than 24 hours, recur frequently, or include swelling in the lips or throat, seek immediate medical attention
Inject the pen 3 inches below the shoulder and 3 inches above the elbow, on the side or back