Seek prompt medical advice if you experience: Severe or rapidly worsening joint pain that significantly impairs function or mobility A hot, swollen, very painful joint with fever this could indicate septic arthritis requiring SAME-DAY emergency hospital assessment Symptoms of severe allergic reaction after B12 injection (breathing difficulty, facial/tongue swelling, widespread hives, dizziness/collapse) call 999 immediately Systemic symptoms such as unexplained weight loss, night sweats, or profound fatigue Neurological symptoms including weakness, numbness, balance problems, or cognitive changes Symptoms affecting multiple joints simultaneously, particularly if symmetrical (both hands, both knees) Morning stiffness lasting more than 30 minutes , which may suggest inflammatory arthritis Your GP will conduct a thorough clinical assessment, including detailed history-taking and physical examination

Vitamin B12 Benefits Vitamin B12 is necessary for proper red blood cell production, DNA formation, nerve function, and metabolism
However, systemic inflammation can reduce plasma PLP levels even when a true deficiency is absent
Additional information Peer review information Nature Metabolism thanks Dominique Langin and the other, anonymous reviewers for their contribution to the peer review of this work
The investigations have found that dietary supplementation with l-carnitine improves post-exercise recovery
L-Carnitine: Benefits, Side Effects, Sources and Dosage. Healthline