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B12 may further support this process by promoting the proper functioning of insulin-producing cells in the pancreas

Dietary Antigens are Available for Intestinal Transport Although the majority of dietary proteins are totally degraded by digestive enzymes and are absorbed in the form of nutrients (amino acids or dipeptides/tripeptides), some however can resist both the low pH of the gastric fluid and proteolytic enzyme hydrolysis, 5 meaning that large immunogenic peptides or intact proteins are capable of reaching the small intestinal lumen

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Methylcobalamin contains a methyl group

Endocrinology 131, 11491156