why vitamin b12 injections versus oral supplemnets gastric surgery vs Supplements: Which Is Better? Oral vitamin B12 versus intramuscular

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(b) improve neuromuscular function, including, but not limited to, following acute muscle injury, following overuse muscle injury, following chronic muscle injury, during strength/resistance and/or endurance training, during/following muscle dysfunction accompanying aging, following muscular atrophy

Link Sikiric P, et al

Vitamin B12 is needed for conversion of homocysteine and therefore can prevent conditions or complications like heart attack, stroke or coronary heart disease

Therapeutic potential of total homocysteine-lowering drugs on cardiovascular disease

They can assess individual needs, recommend appropriate dosages, and monitor the therapy to ensure safety and optimal outcomes