Immediate post-injection care focuses on minimising local reactions: Apply a cold compress to the injection site for 1015 minutes to reduce pain and swelling Avoid massaging or rubbing the area, which can increase bruising Wear loose clothing that doesn't irritate the injection site Gentle movement of the affected limb may help reduce stiffness Hydration and nutrition support general wellbeing during treatment

Diet : those who follow vegetarian or vegan diets are more at risk due to limited B12 sources Pernicious anaemia : an autoimmune condition impacting stomach function Medication impact : certain medications (e.g., Metformin, Nitrous Oxide) Digestive conditions : disorders like Crohns Disease may affect B12 absorption Symptoms of a low Vitamin B12: Rapid breathing or shortness of breath Headaches Indigestion Loss of appetite Palpitations Problems with your vision Numbness Feeling weak or tired Diarrhea A sore or red tongue (sometimes with mouth ulcers) Problems with memory, understanding, and judgments (cognitive changes) Muscle weakness Depression Anxiety Confusion Dementia Problems with balance/coordination Pins and needles Incontinence If you suspect a Vitamin B12 deficiency, its essential to consult your GP for proper testing and treatment

For each eligible study, two authors (MM and AN) independently extracted data, which was then reviewed by a third author (JV) using a piloted spreadsheet, in accordance with Cochrane Collaboration guidelines ( Where relevant data were missing, attempts were made to contact corresponding authors
Beneficial effects of subcutaneous fat transplantation on metabolism
Vitamin B12 injections deliver the nutrient directly into the muscle, bypassing the digestive system altogether
Vegetarians and vegans are also at risk because B12 is mainly in animal products