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Referred to as "pernicious anemia", this happens when, for some unknown reason, the immune system attacks and destroys the parietal cells thereby causing an inability to absorb B12

For broader context on nutrition trials see this randomized trial registry entry: clinical trial listing and for a recent review of vitamin B studies see this open-access review: PMC article

A diet full of vitamins and minerals is the best way to stay healthy and give your body what it needs to thrive

Intrinsic factor Intrinsic factor ( IF ), also known as cobalamin binding intrinsic factor , [5] or gastric intrinsic factor ( GIF ), is a glycoprotein produced by specialized cells of the stomach, either by parietal cells (in humans) or chief cells (in rodents)

Semaglutide suppresses appetite and delays gastric emptying by mimicking GLP-1