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how often to inject b12 Should You Get A Shot For Optimal Health? Vitamin B12: How Frequently Should
Description
Using the same spot repeatedly leads to tissue changes that affect how well the medication works and how comfortable the injections feel

Overall Health General health conditions can also impact the effectiveness of these injections

For people with more subcutaneous fat, the layer may be 15-20mm or deeper, making it nearly impossible to accidentally inject into muscle even at a 90-degree angle

Food and Drug Administration (FDA)
