A 2020 study of "wellness" B12 injections in non-deficient adults found no improvement in energy, mood, or cognitive function versus placebo at 4 weeks (Wolffenbuttel et al., Nutrients , 2020)
This typically improves as treatment continues and should be discussed with your healthcare professional if persistent
Adequate intake of other essential nutrients and overall good health can enhance the bodys response to the injections
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This injection is typically administered into the muscle, allowing for quick absorption and sustained effects
Because it competes at the nicotinamide substrate site rather than the SAM cofactor site, it is also used as the substrate-competitive reference compound against which bisubstrate and covalent NNMT inhibitors are benchmarked