Doctor's Best Fully Active B12

60 vcaps
Doctor's Best Fully Active B12

Fully Active B12 provides the body with methyl-cobalamin, the most biologically active form of Vitamin B12. This health formula helps replenish diminished Vitamin B12 levels due to different genetic and lifestyle factors. It offers effective detox, mood support, nerve cell signalling, and healthy gene regulation.

Supplement Facts

Serving Size: 1 Capsule
Servings Per Container: 60


Amount Per Serving

% Daily Value

MethylCobalamin Vitamin B12

1,500 mcg


Other Ingredients: Cellulose and modified cellulose (vegetarian capsule).

Suggested Use

For adults only. Take 1 capsule once daily, with a meal. Highly recommended for vegetarians.


  • The body uses Vitamin B12 to manufacture heme, the component of hemoglobin that transports oxygen in the blood. By ensuring that the body manufactures enough heme, methyl-cobalamin ensures that there are enough healthy red blood cells to transport oxygen in the tissues for proper functioning.
  • Vitamin B12 helps support healthy energy levels in fatigue and Chronic Fatigue Syndrome. Researchers at University of Maryland Medical Center (UMMC) links fatigue and CFS with Vitamin B12 deficiency. The most prominent symptom of CFS is extreme feelings of tiredness that reduces one’s quality of life.
  • Vitamin B12 can help manage the symptoms of Pernicious and Megaloblastic anemia, which are caused by malabsorption of this nutrient due to lack of intrinsic factor. Anemia is characterised by paleness, fatigue, weight loss, mood swings, and numbness in the extremities. Some doctors prescribe large doses of Vitamin B12 injections for pernicious anemia, a lifelong disease affecting approximately 2 percent of older adults.
  • Vitamin B12 benefits male fertility. Azoospermia, the lack of sperm in the semen is associated with low cobalamin concentrations in the body. Studies suggest that methyl-cobalamin helps ensure health sperm production for increased chances of conception in couples.
  • For the brain, methyl-cobalamin protects the myelin sheath of the brain cells. The myelin sheath is the fatty component of the brain cells needed for nerve functions. Taking Vitamin B12 helps prevent cognitive health problems caused by myelin sheath damage.

Vitamin B12 or Cobalamin is one of the water soluble B complex vitamins essential for the formation of red blood cells and maintenance of nervous system health. This vitamin is derived from animal foods such as organ meats, poultry, milk, meats, dairy products, and clams. It is not found in plant sources unless they are fortified. Doctor's Best Fully Active B12 is formulated with methyl-cobalamin, the most biologically active form of Vitamin B12 to provide its benefits faster and more effectively. Vitamin B12 deficiency is often caused by lack of intrinsic factor, which can either be genetic or lifestyle related. People with digestive conditions such as Crohn’s disease, Celiac disease, pernicious anemia, and intestinal parasite may have problems absorbing this nutrient and may need to get it from Vitamin B12 supplements. Pregnant and breastfeeding women, vegetarians, alcoholics, smokers, and the elderly also are more prone to Vitamin B12 deficiency and can benefit from Fully Active B12. Vitamin B12 deficiency can lead to pernicious anemia and irreversible brain damage. Other symptoms include weakness, sore tongue, rapid heartbeat, difficulty breathing, easy bruising, bleeding gums, constipation or diarrhea. When left untreated, Vitamin B12 deficiency can lead to tingling sensation in the limbs, depression, mood swings, memory loss, and difficulty walking.