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Description
Gastrointestinal Problems Gastrointestinal health issues are another major side effect of vitamin B12

These functional markers are more sensitive indicators of tissue B12 status but have limited availability and can be affected by renal impairment, pregnancy, and hypothyroidism
While oral supplements can work for some, they often have poor absorptionespecially in individuals with digestive issues or chronic fatigue

Gross (Class of 2018)
