Vitamin B12

By: Michael Lam, MD, MPH

Why is Vitamin B12 an important?

B-12 helps maintain red blood cells and nerve cells as well as protect against a variety of conditions. It is also needed to make DNA. It reduces homocysteine, an amino acid that is now known to promote atherosclerosis. Deficiency of vitamin B produces symptoms similar to Alzheimer’s disease. It is naturally found in animal foods such as meat, poultry, and dairy products, most of which should be taken in moderation in an anti-aging diet. In addition, people over the age of 50 may have decreased stomach acid which makes it difficult to separate the B-12 which is bound to proteins listed above. Vegans are especially vulnerable to deficiency and should take supplementation. Vitamin B-12 is non-toxic so daily intake orally or by injection is not a problem. Vitamin B12 also boost energy supply. A good anti-aging dose is 500 – 1000 mcg of vitamin B12 a day. Vitamin B12 is water soluble.


  • Janet says:

    At what age is best recommended to start taking B12 for anti aging purposes?

    • Dr.Lam says:

      B12 is not needed if you have a good diet. If you want to be sure for optimum health, start at age 35 is good.

      Dr Lam