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Changes in renal function may also occur in patients experiencing significant weight loss, as glomerular hyperfiltration associated with obesity improves
B12 injections are considered safe for most adults
Many do well on oral supplements, but someone who is already symptomatic and confirmed low may recover faster with injections before switching to oral maintenance
Normal B12 in the blood does not equate to normal B12 in the brain
Most healthy individuals will obtain enough from their diet alone, as it can be found in meat, seafood and animal products, such as milk
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