Therefore, the first place you need to look when the benefits of a methyl-B12 shot seems to wear off too soon is to retry the shots at the same dose and frequency but make the angle of attack much more severe, much closer to the horizontal plane, just under the skin
If AHK-Cu is used at all, the better-evidenced route for its hydrophilic chemistry is topical [5] , and even then it is at most a speculative cosmetic adjunct to an evidence-based plan not a stand-alone solution, and certainly not something the data support injecting
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Symptoms of severe vitamin B12 deficiency can include visual disturbances, severe joint pain, paresthesia (tingling in the hands and feet), memory problems, depression, anxiety, poor muscle function, ataxia (impaired balance and coordination), changes in reflexes and even infertility