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Jumping straight to a high dose would increase the likelihood of side effects such as nausea and digestive discomfort
They are not a stand-alone weight-loss treatment
If you notice yourself feeling tired throughout the day, as if your energy levels quickly deplete even though you eat and sleep well, you might have a vitamin B12 deficiency
L.BottaryR.SchoerningL.BaerL.GonencA.Eric JensenJ.et al (2020)
Gumen AV, Kozinets IA, Shanin SN, Malinin VV, Rybakina EG
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