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Lang et al., 2011

The National Institutes of Health recommend the following daily dosage of vitamin B12: Birth to 6 months: 0.4 micrograms Infants 712 months: 0.5 micrograms Children 13 years: 0.9 micrograms Children 48 years: 1.2 micrograms Children 913 years: 1.8 micrograms Teens 1418 years: 2.4 micrograms Adult men and women 1850 years: 2.4 micrograms Adult men and women over 50 years: 25250 micrograms Women who are pregnant: 2.6 micrograms Women who are breastfeeding: 2.8 micrograms Adults over the age of 50 are at a greater risk of vitamin B12 deficiency because they tend to produce less stomach acid, which is needed to convert the vitamin properly

Atypical presentations include isolated fatigue, depression, gastrointestinal symptoms, or urinary complaints without obvious menstrual correlation

Alpha-fetoprotein (AFP) is a glycoprotein that is highly expressed in embryonic liver and in hepatic progenitor cells (hepatoblasts) (Usynin and Panin, 2008

Does Vitamin C Improve Glutathione Absorption