<https://joannekennedy.com.au/2019/01/23/vitamin-b12-and-depression/#webpage>
<http://schema.org/description>
"Vitamin B12 deficiency can cause depression. B12 is essential for methylation and synthesis of important neurotransmitters for mood including serotonin and dopamine."
<https://joannekennedy.com.au/2019/01/23/vitamin-b12-and-depression/>