Subcutaneous injections arent usually very painful because they use small needles
Higher-Caution Situations Extra medical supervision is important if you: have a history of reactions to injectable vitamins/cobalamins have significant kidney or liver disease are pregnant or breastfeeding are offered a compounded MIC B12 product without clear labeling of ingredients, concentrations, and compounding source The FDAs overview of compounding helps explain why quality can vary (see Compounding and the FDA: Questions and Answers )
Treatment typically begins with weekly injections for several weeks, followed by monthly maintenance doses
Why Vitamin B12 Matters Among the most important nutrients, vitamin B12 is crucial to health
Users may experience increased energy levels, improved sleep quality, reduced appetite, and enhanced mood
there is no human clinical trial by any route, and no validated injectable dose