The NHS highlights common symptoms tied to B12 deficiency, connecting low levels directly to both physical and neurological issues
Clinical studies have used schedules more intensive than those seen in recovery practice: patients with Parkinson's disease received 1,400 mg three times a week for four weeks (Hauser et al., Movement Disorders 2009, PMID 19230029), while studies on skin lightening used 1,200 mg twice a week for six weeks (Alzahrani et al., Cureus 2025, PMID 40013212)
84 GPs should screen for extraintestinal manifestations and also consider nonpharmacological management options that can provide symptom relief, such as physical exercise and physiotherapy for arthropathies
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