Practice 10 minutes of 4-7-8 breathing (inhale 4 counts, hold 7, exhale 8) twice daily, ideally before meals, to activate the vagus nerve and restore the parasympathetic state that allows gut immune function to operate at full capacity
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The most common cause is pernicious anemia, an auto-immune disorder that affects around one in every 10,000 people
PubMed Alba, M., Fintini, D., Bowers, C.Y., & Salvatori, R
Most gastrointestinal effects are dose-dependent and tend to improve as the body adjusts over the first four to eight weeks