As an essential nutrient, B12 plays a vital role in the bodys ability to convert food into energy, which can make a noticeable difference when trying to maintain an active lifestyle and stay on track with your fitness goals
B12 Supplements, Benefits, and Dosage How is vitamin B12 supplemented
Repeated injections in the same spot can cause lipodystrophy, the formation of hard or lumpy tissue that affects absorption
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You should contact your GP or NHS 111 if you experience: Persistent diarrhoea lasting more than 7 days in otherwise healthy adults Blood or mucus in stools , which may indicate inflammatory bowel disease or infection Severe abdominal pain or cramping that is worsening or different from previous digestive symptoms Unexplained weight loss alongside bowel changes Signs of allergic reaction , including rash, itching, swelling, or difficulty breathing (call 999 or go to A&E for severe reactions) Neurological symptoms such as numbness, tingling, balance problems, or memory difficulties, which may indicate B12 deficiency is not being adequately treated Seek help sooner if you have red flag symptoms, are pregnant, immunosuppressed, elderly, or have significant underlying health conditions
The amount of vitamin B12 included in a supplement varies between brands