Hi, here's some information on B12 and parasites...

From http://www.health-truth.com/articles/parasites03.asp:
"Right now there is an 85% chance that you, the reader, are infected with parasites. Whether you are healthy or sick does not make a difference."

From http://www.genhealth.com/hupara.htm:
"Well over 80% of patients we check have some type of parasite or bacteria and the slight inflammation of the abdomen, and unrelated pains and aches which indicate the presence of parasites.

For instance, in a pamphlet put out by a medical manufacturer in America, we read: Colon therapy has an anthelmintic action (this means parasites are removed). We find that over 90% of the people we examine in our clinics have some form of parasites. The most common of all are tapeworms. Our skilled technicians report seeing green, brown, grey, yellow and white ones, and various combinations."

From http://www.aim4health.com/parasite.htm:
"Once in your body, different parasites behave differently. Some parasites eat the food you are eating (sugar is a favorite parasite food), while others eat YOU! Parasites can attach themselves to the body and suck out its nutrition. different types of parasites can cause a deficiency of vitamin A, vitamin B12, and iron."

From http://gaylor-web.com/Herbs/Info/parasites.htm:
"Parasites enter your body in one of four ways: through food and water intake; through a transmitting agent, such as a mosquito; through sexual conduct; and via the nose and skin. The parasite is often harmful. Any number of them can infect your gastrointestinal tract. Most parasites produce similar symptoms, as noted above. Parasites survive and reproduce in the body, often for long periods of time-- years! Once in your body, different parasites behave differently. Some parasites eat the food you are eating (sugar is a favorite parasite food), while others eat you! Parasites can attach themselves to the body and suck out its nutrition. Different types of parasites can cause a deficiency in
vitamin A, vitamin B12, and iron."

From http://altmedicine.about.com/cs/cond...Parasites.htm:
"It is estimated that three out of five Americans will be affected by parasites at some point in their lives.

Parasites can sometimes appear like a digestive problem. Chronic diarrhea is a common sign of parasites. Parasites can cause a wide variety of symptoms, such as abdominal pain, allergy, anemia, bloating, bloody stools, chronic fatigue, constipation, cough, diarrhea, gas, irritable bowel syndrome, itching, joint and muscle aches, nervousness, hives, allergic reactions to foods, mucus in the stools, poor immune response, rashes, sleep disturbances, teeth grinding, fever, unexplained weight loss.

Parasites can deplete the body of nutrients such as vitamins A, B6, and B12, potassium, calcium, and magnesium, overwhelm the immune system, which can lead to severe illness. Symptoms can come and go depending on the life cycle of the parasite involved.

Parasites are a hidden disease, because most people who have parasites don't know it. Researchers are beginning to see how parasitic infections may mimic or be involved in diseases such as rheumatoid symptoms, chronic fatigue syndrome, Crohn's disease, ulcerative colitis, irritable bowel syndrome, diarrhea, AIDS, and arthritis.

Sources of Parasites
Many people think parasites are something we only get from traveling in other countries, but this is not true. Contaminated water supplies, international travel, day care centers, pets, consumption of raw fish are just some of the reasons why parasites have become more prevalent.

Food: Raw or undercooked beef may contain tapeworms or the roundworm Trichinella. Raw fish such as sushi, sashimi, ceviche, and smoked salmon may contain tapeworms and anisakid worms. Poor digestion can be a contributing factor. Someone with a low acid level in the stomach may not be killing germs in the foods they eat.

Water: Two of the most common parasites are Giardia and Cryptosporidium, which can survive even in chlorinated water for up to 18 months.

Travel: Parasites that were once associated with tropical diseases are now appearing in North America, due to the rise in international travel and migration.

Pets: Some of the parasites that may be transmitted from pets to human include roundworm, hookworm, and toxoplasmosis. They are transmitted through contact with fur containing parasite eggs, infected fleas, or contact with animal feces."