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Vitamin B12 is essential for healthy red blood cells and nerve function, and when levels are low, symptoms can build gradually and be easy to dismiss as stress, sleep, or a busy life
It works alongside sodium to maintain fluid balance, helps produce stomach acid for digestion, and assists in carbon dioxide transport
Initial doses of 2.5 mg are primarily for gastrointestinal tolerance rather than maximum weight loss
There is also one interaction worth knowing rather than guessing: tirzepatide's prescribing information advises anyone on oral contraceptives to use a back-up or non-oral method for 4 weeks after starting and after each dose increase
Endocrine regulation of gut function a role for glucagon-like peptide-1 in the pathophysiology of irritable bowel syndrome
The foods to avoid on GLP-1 agonists apply equally to retatrutide
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