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After stomach acids release B12 from food, a protein made in the stomach, called intrinsic factor, delivers it to the digestive tract where it is absorbed
References Heffernan, M., et al
The Kuzminski trial involved 33 patients (18 in the oral arm and 15 in the intramuscular arm), while the Bolaman trial involved 60 (26 in the oral arm and 15 in the intramuscular arm)
Raises NAD+ and SAM The same study showed that NAD+ and S-adenosyl-methionine (SAM) both went up after NNMT inhibition
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