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The inclusion of participants experiencing these hormonal changes may be another limitation of the study
(16) How Much Vitamin B12 Do You Need
However, these injections will not work as well if you have a condition that interferes with your digestive systems ability to break down and absorb this vitamin
The primary mechanism involves intrinsic factor binding in the stomach, while a secondary pathway allows small amounts to absorb through passive diffusion
But if your doctor confirms a B12 deficiency, these injections can be a safe and effective way to reduce fatigue
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