Even meat-eaters can become deficient if they have poor methylation, high stress, or chronic fatigue
JDC and JCH contributed materials
Here is a full list of B vitamins: thiamin (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6), biotin (B7), folate/folacin or folic acid (B9) and cobalamins (B12)
Neuroimaging studies have shown a reduction in hippocampal volume and abnormal prefrontal cortical activity, which strongly correlates with impairments in verbal memory and information processing speed ( 2.3.2 Psychiatric symptoms METH abuse disrupts the functionality of various brain regions, including the prefrontal cortex, nucleus accumbens, and thalamus, leading to significant psychiatric disturbances (Sekine et al., 2001)