does b12 injections help with weight loss shots for loss: Do they work, risks, benefits, and more The Timing of B12 Injections:

While individuals with mild vitamin B 12 deficiency may not experience symptoms, blood homocysteine and/or MMA may be elevated (18)

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[30] Cobalamin analogs prepared by this method include the naturally occurring coenzymes methylcobalamin and cobamamide, and other cobalamins that do not occur naturally, such as vinylcobalamin, carboxymethylcobalamin and cyclohexylcobalamin

In many cases, individuals with B12 deficiency may receive injections once a week for several weeks, followed by less frequent maintenance injections, such as once a month