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Description
A 2019 study found sublingual B12 supplements (aka the kind you put under your tongue) were even more effective than B12 shots

Synergy of sibutramine and low-dose leptin in treatment of diet-induced obesity in rats

This is acidic enough to solubilize peptides that aggregate at neutral pH but mild enough that it will not damage peptides during short-term dissolution
At our Northeast Frisco clinic, providers evaluate your health history, symptoms, and lifestyle factors to determine whether Vitamin B12 injections are an appropriate option