Parietal cells generate stomach acid as well as a substance called intrinsicfactor, which enables a vitamin called B12 to be absorbed further along in the gut.
壁细胞产生胃酸，以及一种叫做内在因子的物质，使得维生素B12能够在肠道里得到吸收。
2
This stops intrinsicfactor from attaching to B12, and so the vitamin cannot be absorbed into your body.
这个站的内在因素，从重视B12的，所以维生素不能吸收到您的身体。
3
Sometimes, your GP may want to check your blood for intrinsicfactor antibody levels.