Signs You May Be Low in Vitamin B12 Persistent tiredness or lack of energy Brain fog or poor concentration Low mood, irritability, or anxiety Pale skin or dark under-eye circles Frequent headaches or dizziness Pins and needles or numbness in hands and feet Weak immune response Difficulty sleeping A deficiency in B12 is particularly common among vegetarians, vegans, people with digestive disorders, or those with high-stress lifestyles
Mochida Y, Taguchi K, Taniguchi S, Tsuneyoshi M, Kuwano H, Tsuzuki T et al (2003) The role of P-glycoprotein in intestinal tumorigenesis, disruption of mdr1a suppresses polyp formation in Apc(Min/+) mice
Selected publications: Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+ FEBS Letters, 1988
MPT inhibition by NIM811 prevented cell death and/or mitochondrial depolarization after both high and low dose APAP, while the JNK inhibitor SP600125 decreased mitochondrial depolarization after low dose
