Intrinsic factor deficiency, Imerslund-Grsbeck disease, Addisons pernicious anemia, obesity, bariatric surgery, and gastrectomies have also been known to cause B12 malabsorption
[30] Cobalamin analogs prepared by this method include the naturally occurring coenzymes methylcobalamin and cobamamide, and other cobalamins that do not occur naturally, such as vinylcobalamin, carboxymethylcobalamin and cyclohexylcobalamin
Definitely helped with weight loss and energy too
doi:10.1111/j.1538-7836.2004.01067.x Egert S, Bosy-Westphal A, Seiberl J, et al
we advise doing it once a week for four weeks, then once a month
This buffer makes it easier to clear bubbles cleanly