Some people who arent B12 deficient also feel energized after supplementing with the nutrient
Symptoms of deficiency can vary from person to person, but may include impaired brain function, tiredness and lack of energy, breathlessness and fatigue, headaches, pale skin, heart palpitations, loss of appetite and weight loss, anxiety and depression
People who don't get enough of the essential vitamin can experience nausea, fatigue, dizziness or depression among other symptoms
Vitamin B-12 deficiency can cause weight gain
The dose depends on the persons health
Plasma levels decline with age, which is part of why it became a research target for skin, hair, and wound healing