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(14) In effect, the optic nerve does not receive the nutrients and oxygen it needs
Alzheimers disease risk genes and mechanisms of disease pathogenesis
Faulder CG, Hirrell PA, Hume R, Strange RC
Within-group comparisons were conducted using the paired t test, while between-group comparisons used unpaired t tests
A 2021 systematic review of 16 randomized controlled trials and 6,276 participants (Markun and colleagues, Effects of Vitamin B12 Supplementation on Cognitive Function, Depressive Symptoms, and Fatigue, Nutrients, 2021) found that B12 supplementation does not reliably reduce fatigue in people who are not deficient
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