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Iron is also a component of enzymes involved in the electron transport chain and citric acid cycle, two processes in the mitochondria that convert macronutrients from our food into ATP, the energy that powers all bodily processes
For individuals with atrophic gastritis, pernicious anaemia, or those taking proton pump inhibitors , food-bound B12 absorption is already compromised
it is often used in supplements due to its perceived stability and cost efficiency compared to other types of vitamin B12
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