The NHS does not set an upper safe limit for B12 because harmful effects from excessive intake have not been definitively established
Plus, they carry potential risks of thyroid tumors, cancer, pancreatitis and gallbladder and kidney problems
10.1002/ijc.31870 129 Nowak-SliwinskaP.ScapozzaL.Ruiz i AltabaA
Food Funct 13, 227241.Google Scholar Fovet, T, Guilhot, C, Delobel, P et al
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