The changes to your stomach and small intestine after bariatric surgery can affect your absorption of B12
What Are the Benefits Patients Look For
Choosing an Injection Site For intramuscular injections, youll want to inject into your gluteal muscle (your butt), your thigh muscle, or your shoulder muscle
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Onset Speed and Consistency of Results Injections bypass the skin barrier entirely and could theoretically provide more rapid systemic uptake
Further Defining BPC 157/Muscle Relation 3.3.1