Vitamin B12 is essential for many bodily functions, including energy production, mood regulation, and red blood cell formation
If you find yourself forgetting things more than usual or struggling to stay sharp, a B12 injection could make a noticeable difference within days
Vitamin B12 shot side effects Most people tolerate vitamin B12 injections well, but possible side effects include: Mild: soreness or redness at injection site, mild diarrhea, nausea, headache, itching Rare but serious: allergic reactions (rash, swelling, difficulty breathing), low potassium (hypokalemia), dizziness or heart rate changes Get emergency medical help if you have signs of an allergic reaction to Vitamin B12: hives
Common symptoms include fatigue, weakness, anemia, numbness or tingling, and difficulty thinking
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Problems with bodily absorption of the vitamin appear in 20% of people over 60 in the United States and United Kingdom according to research, and people with vegetarian or vegan diets are more likely to struggle with this condition
