Great results.
As to the B12, this article explains it. As they are water soluble you will pee out any excess. You may be wasting your money but unless you have a blood test then you will never know.
http://www.diabetesselfmanagement.c...metformin_and_risk_for_vitamin_b12_deficiency
In recent years, there’s been some concern over the risk of vitamin B12 deficiency in people who take metformin. Vitamin B12 (also known as
cyanocobalamin or
cobalamin) plays many important roles in the body, such as keeping your blood cells and nervous system in tip top shape. There’s also some evidence that vitamin B12 may help prevent heart disease and possibly even Alzheimer disease (the jury is still out on this one). This vitamin is found primarily in animal foods, such as beef, seafood, eggs, and dairy products, which is why some vegetarians are at risk for a B12 deficiency. Elderly people are often at risk for deficiency as well, due to problems with absorption from the gastrointestinal tract. Symptoms of B12 deficiency include certain types of anemia,
neuropathy, memory loss, confusion, and even dementia.
This link explains more about the fact that they are water soluble but that they are not harmless if taken in excess..
http://www.medicinenet.com/script/main/art.asp?articlekey=79102
The water-soluble vitamins are B and C. The B vitamins include thiamin, riboflavin, niacin, folate, pyridoxine, and B12. The water-soluble vitamins are easily dissolved and can be excreted in the urine. This does not mean that you can take these in unlimited quantities. There can be problems with excessive amounts, so upper limits have also been set for the water-soluble vitamins. You can find detailed information on sources, requirements, functions, and upper limit levels for all vitamins at the
USDA Food and Nutrition Information Center.
Hope this helps.
CC.