The Food and Nutrition Board has not established a Tolerable Upper Intake Level (UL) for vitamin B12 because of its low toxicity potential
Tissue loading may occur at even lower rates of administration
Other symptoms related to Vitamin B-12 deficiency are weight loss, loss of hearing, anemia, loss of appetite
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2 Vitamin B1 Vitamin B1, or thiamine, is an essential nutrient obtained through dietary sources such as whole-grain products, brown rice, meat, vegetables, and fruits (28)
THE ROLE OF VITAMINS IN HAIR LOSS B12 & YOUR HAIR Hair is made of a protein called keratin