Common side effects include mild injection site reactions (such as pain, redness, or swelling), headache, flushing, dizziness, and nausea
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The best results come from correcting deficiency or maintaining levels when you cannot absorb B12 properly
Lead author, Dr Natasha Tyler said: Patients with vitamin B12 deficiency often report feeling marginalised and describe their interactions with primary care as battles and report feeling stigmatised
Animal proteins, including red meat, poultry, fish, eggs, milk and dairy products all have the vitamin
Red light therapy also improves blood flow to the treated area, leading to better oxygen and nutrient delivery to affected site