If you dont consume much vitamin B12 in your diet, or if your absorption rates are low, you should take a vitamin B12 supplement to keep your cardiovascular system functioning well and prevent conditions like heart disease and stroke
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Common Side Effects of B12 Injections Most people do well with Vitamin B12 shots, but some might feel a bit of pain or discomfort where the shot was given
Other common signs include having trouble thinking clearly, struggling with memory, or experiencing mood swings that feel out of character
A 2025 meta-analysis of 16 studies involving 6,098 participants found no statistically significant difference between intramuscular, oral, and sublingual B12 supplementation routes (p=0.270)