are vitamin b12 tablets as good as injections Do You Need a Prescription for Injections? Vitamin B12 A Vitamin B12

Cyanocobalamin is for individuals who have a diagnosed vitamin B12 deficiency or are at high risk of developing one

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If you're clearly deficient and start appropriate supplementation or injections, many people notice energy improvements within one to two weeks

As people age, the ability to absorb vitamin B12 from food often diminishes due to decreased stomach acid production

Scientific References Hydroxocobalamin Drugs BNF

That said, oral supplements are not always ideal for people who already feel run down or who need faster results