For most individuals, structured resistance training, adequate protein intake and proper recovery remain the safest and most proven methods for building lean muscle mass
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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
Energy metabolism: B12 helps your body convert food into usable energy, which is one reason low levels can leave you feeling drained
These risks are exactly why an intramuscular injection is safer given by a trained clinician than self-administered at home
After opening: yes, refrigerate