This vitamin is critical for your nervous system and the production of DNA and RNA, which are the building blocks for all the cells in your body. That means a B12 deficiency can cause serious health problems, including exhaustion, memory trouble, muscle weakness, shortness of breath, gut issues, and more.
Studies also show that low B12 causes an increase in risk for cardiovascular disease and even affects your mental wellbeing. In fact, B12 deficiency has been linked to depression and anxiety disorders, as well as increased symptoms in autism, schizophrenia, and other mental illnesses.
You can only get B12 from eating meat so vegetarians and people who have problems with digestion must supplement with B12.
Anyone suffering from gut issues, taking antacids/reflux medication, or over the age of 50 almost always needs more B12 in their diet.
Studies also show that regular consumption of alcohol stops your body from absorbing the B12 in your diet so regular alcohol drinkers should supplement B12 as well.