Bottom line up front:

B12 is a water soluble vitamin that helps in nerve and blood cell help. It also assists the DNA is producing genetic material in cells

 

What is it?

Per the NIH, Vitamin B12 is a nutrient that helps keep the body’s nerve and blood cells healthy and helps make DNA, the genetic material in all cells. Vitamin B12 also helps prevent a type of anemia called megaloblastic anemia that makes people tired and weak.

 

What does that mean?

B12 is necessary for blood cell health

 

Why might you take it?

Help prevent anemia

Help prevent fatigue

Vegetarians/Vegans (B12 is only found in animal products)

​

How much can I take?

Varies based on age, though adults need 2.4mcg daily

 

What happens if I don’t get enough?

Weakness

Fatigue

Memory issues 

Balance issues

 

What happens if I take in too much?

Likely nothing

​

What can I eat?

Beef

Fish

Poultry

Eggs

Milk

Liver

Fortified cereals

​

Final take:

B12, like most supplements, is best absorbed through foods. People with GI issues (Crohn's, Ulcerative Colitis, Gastric Bypass) can have trouble with absorption. Older adults can also have issues with this, leading to memory issues--sometimes mistaken for dementia. Most healthy adults do NOT have a B12 deficiency, though likely there is no harm if taken as a supplement.