Vitamin B12

Vitamin B12

Vitamin B12




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

Dosage & Duration

You should be able to get all the vitamin B12 you need by eating a varied and balanced diet. If you take vitamin B12 supplements, do not take too much as this could be harmful. Taking 2mg or less a day of vitamin B12 in supplements is unlikely to cause any harm.


  • Vitamin B12 is needed to convert carbohydrates into glucose in the body, this helps energy production and decreases fatigue and lethargy in the body.

  • Vitamin B12 helps in healthy regulation of the nervous system, reducing depression, stress, and brain shrinkage.

  • Vitamin B12 helps maintain a healthy digestive system. It also protects against heart disease by curbing and improving unhealthy cholesterol levels, protecting against stroke and high blood pressure.

  • Vitamin B12 is essential for healthy skin, hair and nails. It helps in cell reproduction and constant renewal of the skin.

  • Vitamin B12 helps protect against cancer including breast, colon, lung and prostate cancer.


A review of vitamin B12 in dermatology


Vitamin B(12) deficiency and depression in physically disabled older women: epidemiologic evidence from the Women's Health and Aging Study