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[DOI] [PubMed] [Google Scholar] 71.de Heer J, Rasmussen C, Coy DH, et al
Wen, Y., Cai, J., He, K
Oral supplements are an option, but injections provide faster and more effective absorption by delivering vitamins directly into the bloodstream, bypassing the digestive system
doi:10.1016/0014-5793(88)80509-x Maquart FX, Bellon G, Chaqour B, et al
