In many cases, B12 shots are available by prescription only
4.1 Resistance to inhibitors of glutamine metabolism Due to the plasticity of tumor cell metabolism, tumor cells evolved an adaptive metabolic network in the absence of glutamine supply
10.1002/jor.22831 12 FuX.XuM.JiaC.XieW.WangL.KongD.et al (2016)
The efficacy of a product depends on factors like concentration, stability, and skin penetration
(Usually hot liquid that is 170 degrees Fahrenheit or hotter is needed to fully dissolve the powder.) You can add some to soups or stews or use some in baked goods and treats, like pudding, mousse, custard, cream cheese, oatmeal, gummies, homemade jello or even pie crusts