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While you should know about methylcobalamin tablet uses, it is equally necessary for you to study its side effects before taking it

The fish tapeworm (Diphyllobothrium latum) absorbs huge quantities of vitamin B12 and infested patients often have associated gastric atrophy

Its key to teach patients about B12-rich foods like meat, fish, and dairy

doi:10.3389/fcvm.2019.00132 De Angelis G, Cimon K, Sinclair A, et al

This classic sign typically appears in severe, prolonged iron deficiency Brittle nails : Increased fragility with splitting, peeling, or easy breakage at the free edge Pallor of the nail bed : The normally pink nail bed appears pale or white due to anaemia Vertical ridging : Longitudinal lines or grooves running from cuticle to tip, though these are also common with ageing and may not indicate deficiency Slow growth : Reduced nail growth rate compared to normal (approximately 3mm per month), though this is non-specific and occurs with ageing Nail changes occasionally associated with B12 deficiency include: Blue-grey or brown hyperpigmentation : Diffuse darkening of the nail plate, though this is rare Longitudinal melanonychia : Dark vertical bands, particularly in darker-skinned individuals Brittle texture : Similar to iron deficiency, with increased fragility Nail plate thinning : Overall reduction in nail thickness IMPORTANT : A new or changing dark band on a single nail requires urgent medical assessment, as this may indicate subungual melanoma (a form of skin cancer) rather than nutritional deficiency