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As with most shots, a B12 shot is injected directly into a patients muscle, usually in the thigh or upper arm

Before we cover anything else in this guide, let us be specific about what vitamin B12 injection therapy mechanically does inside the skin, the muscle, or the bloodstream, and where the realistic ceiling sits

Taylor T, Dluhy RG, Williams GH

Consequently, whilst it is clearly a key component in the diet and there may be potential for supplementation to have beneficial effects, evidence to support the administration of tryptophan above and beyond what can be consumed in a healthy diet is currently lacking and further investigation is required

Cells synthesize it from three amino acids: glutamate, cysteine, and glycine