
B12 is reabsorbed or recycled within the body and this process is known as enterohepatic circulation, which is why it can take up to 25 years for a deficiency disease to develop. If your low B12 is due to absorption problems it could take only 3 years. Deficiency due to absorption problems could be due to:

- Antibiotics
- Alcohol (liver)
- Smoking
- Processed Food or Poor Diet
- Stress
- Elevated Blood Homocysteine
- Aging (Over 50)
- Those with gastric inflammation
- Medications: Metformin, Omeprazole, Fluoroquinote, Oral Contraceptives
The good news is that by taking B12 Methylcobalamin supplementation in a short time the enterohepatic system will restart. B12 is not really a vitamin, it is a bacteria found in soil.

Dr. Mc Cully Kilmer research on Homocysteine:
Elevated Blood Homocysteine causes:
- Stroke/Heart Attack
- Vascular Damage
- Arteriosclerosis
- Arterial Damage
High homocysteine is caused by too much methionine from protein and a deficiency of Vitamins B6, B12 and Folic Acid. Vegetarians are more protected because they consume less meat, fish and dairy products. High levels of animal based proteins puts a strain on the body for B6, B12 and Folic Acid. Plant based protein creates less strain. Also harsh chemical treatment of food processing i.e. milling wheat reduces B6 by 50% . Certain medications anticonvulsants (phenytoin) and antidiuretics also increase homocysteine = kidney failure.
To increase levels of B12, B6 and Folate naturally via diet:
- Emphasize Fresh unprocessed raw Fruits and Vegetables
- Whole grains and legumes
- Reduce synthetic fats and sugars
- 2-4 oz daily of either fresh meat, liver or eggs. (one egg is 2 ounces)