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B12 is an essential part of our natural biochemistry
The combined effect may be stronger than expected
doi: 10.1073/pnas.1305227110 31 RomanFBurnyWCeregidoMALaupzeBTemmermanSTWarterLet al
Samir Sinha, who was not involved in the research, said B12 shots can't provide "a big boost." "Getting B12 shouldn't instantly make you feel great or more powerful," he said
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