#### Note: Always consult a healthcare professional before starting any new medication or treatment regimen
Contact your GP if you experience: Unexpected symptoms after starting B12 supplementation, including persistent skin reactions, gastrointestinal disturbance, or mild allergic manifestations Neurological symptoms such as significant tingling, numbness, weakness, or balance problemsthese may indicate B12 deficiency paradoxically, or alternative neurological conditions requiring assessment Unexplained fatigue or malaise that develops or worsens despite supplementation Concerns about medication interactions , particularly if taking metformin, proton pump inhibitors, or other medications affecting B12 metabolism [2] [4] Seek emergency medical attention (call 999) if you develop signs of a severe allergic reaction following B12 injection, including facial swelling, difficulty breathing, or widespread urticaria
Other systemic effects (rare): Adults typically clear small amounts of benzyl alcohol without issue
The most important function of Vitamin B12 is to supply energy to the body and natural sources of B12 can be Meat, Milk, other dairy products, Poultry, Fish & Eggs
Through these pathways it promotes lipolysis (fat breakdown), increases protein synthesis and supports gains in lean body mass [7] [8]
Systemic effects including cognitive benefits, mood regulation, and general tissue maintenance could work with either route, though injection delivers more predictable exposure levels