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Blood samples were placed immediately on ice, plasma collected after centrifugation and stored at 80 C until required
10.1073/pnas.1402898111 53 JinY
Interestingly, while our study observed consistent vitamin B12 levels across different age groups and sexes in both depressed patients and healthy controls, Penninx et al
ACS Nano 16 (3), 36473663
Many vegans use blue-green algae as a form of B12
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