5 Conclusion This systematic review and meta-analysis indicate that sublingual and oral vitamin B12 administration provide efficacy comparable to intramuscular injection in improving serum cobalamin levels and reducing hyperhomocysteinaemia
Daz-Lpez A, Babio N, Martnez-Gonzlez MA, Corella D, Amor AJ, Fit M, Estruch R, Ars F, Gmez-Gracia E, Fiol M, Lapetra J, Serra-Majem L, Basora J, Basterra-Gortari FJ, Zanon-Moreno V, Muoz M, Salas-Salvad J
So either you do that or, or then you have to go to another form
But it does require following a specific sequence to protect the peptide from damage
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Its important to note that: Not all tiredness is caused by vitamin B12 deficiency