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However, the RDA of 2.4 mcg for people under 50 years of age is much harder to meet on a vegetarian or vegan diet
Several groups face higher risk, including: Older adults (due to reduced stomach acid production) Vegans and vegetarians (limited dietary sources) Individuals with pernicious anaemia (an autoimmune condition affecting B12 absorption) People with gastrointestinal disorders such as Crohn's disease or coeliac disease Those who have undergone gastric surgery People taking certain medications long-term, particularly metformin and proton pump inhibitors Individuals with recreational or medical nitrous oxide exposure (which can inactivate B12 and cause acute neurological symptoms) Vegans and vegetarians should ensure adequate B12 intake through fortified foods (such as some plant milks, breakfast cereals, and yeast extracts) or supplements
It also contains: sodium chloride glacial acetic acid water for injections
In animals, B12 is normally attached to a protein either for transport or storage
The main difference is how and how often theyre taken
