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It is for this reason that the latter is not routinely available on the NHS and hydroxocobalamin is the preferred treatment

Any perceived benefits typically relate to correction of deficiency symptoms such as fatigue, which may indirectly improve capacity for physical activity

Advertisement Article continues below this ad Swelling A possible reaction to a cyanocobalamin injection is swelling

These signs often go hand in hand with underlying gut conditions that block proper cobalamin absorption

They might also see redness or swelling, or feel a bit of itching or rash

What they do is support the metabolic processes that make weight loss easier