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After first-line treatments and diagnostics, including diet change, addition of probiotics, and fecal analysis, were performed, a GI panel determined serum cobalamin, folate, and trypsin-like immunoreactivity
Medical bodies warn that off-label or unsupervised use carries unknown risks
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Neurological Symptoms Several Weeks to Months If you have tingling, numbness in your hands or feet, or balance problems caused by B12 deficiency, these symptoms take longer to improve
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