Vitamin B12 given as hydroxocobalamin is usually intended for the muscle, and a needle that is too short can deposit it in the fat layer instead
Key B12-rich foods to look out for include: Animal Products: Beef, liver, chicken, fish (like salmon and tuna), and eggs
As the condition worsens, common symptoms include: weakness and fatigue light-headedness and dizziness palpitations and rapid heartbeat shortness of breath a sore tongue that has a red, beefy appearance nausea or poor appetite weight loss diarrhea yellowish tinge to the skin and eyes
The injection is providing you with the necessary B vitamins regardless of your food intake, which is helpful especially if you have trouble eating a balanced diet (due to illness or other reasons)
Intramuscular injection may occasionally cause skin rash, itching, diarrhea, and allergic asthma