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High-dose oral cyanocobalamin (1,000 mcg daily) or intramuscular hydroxocobalamin injections are the preferred supplementation routes, as both bypass the need for intrinsic factor

Injections work but they're a barrier most people won't sustain

Use of over-the-counter medications during pregnancy

Neurobiol Dis 16:113 Ellwanger JH, Franke SI, Bordin DL, Pra D, Henriques JA (2016) Biological functions of selenium and its potential influence on Parkinsons disease

The results indicated that after drug intervention, the number of differentially expressed genes between the caffeine and HFHC groups was more than three times that which was observed between the EGCG and HFHC groups