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Improve Your Heart Health: Injections of vitamin B12 can successfully reduce homocysteine levels, which are linked to a higher risk of heart disease
Mental clarity Because B12 supports nerve signaling, injections may help improve focus, concentration, and the foggy feeling associated with low B12 levels
Capsules may offer minor benefit, especially for gut health, but they have very low bioavailability and lack clinical support
Energy The research is limited and far from a slam dunk but Cowling says higher doses of B 12 supplementation may increase energy, particularly if you have a deficiency or are at risk of a deficiency
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