by 
vervo
ANSWERS: 2
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Yes
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Yes, "Vitamin B12 is a nutrient that helps keep the body’s nerve and blood cells healthy and helps make DNA, the genetic material in all cells. " https://ods.od.nih.gov/factsheets/VitaminB12-Consumer/#:~:text=Vitamin%20B12%20is%20a%20nutrient,makes%20people%20tired%20and%20weak.
Shaky_1991 
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