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Therefore, B12 from food or oral supplements will be poorly absorbed if: There is low stomach acid due to use of a Proton Pump Inhibitor (PPI) There is low intrinsic factor
How do I determine if I have a vitamin B12 deficiency
Vitamin B12 & Hair Growth: What To Know Before Supplementing. September 2025
The B12 in supplements is synthesised in laboratories using fermented bacterial cultures which are refined and added to capsules, liquids and patches available over the counter
Many people have lower-than-ideal levels without realising, particularly vegans, vegetarians, women on the pill, anyone over fifty and those with absorption issues such as coeliac or pernicious anaemia
Note: The above statements have not been evaluated by the FDA (U.S
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