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Testing MTHFR and other relevant genetic markers can identify these individuals, though routine genetic testing for b12 supplementation decisions remains controversial
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Most patients reporting subjective benefit notice energy improvement within 48-72 hours of the first injection, with peak effect at days 4-7
If you missed any in this series, check out: The Symptoms of Vitamin B12 Deficiency The Optimal Vitamin B12 Dosage for Adults Healthiest Food Sources of Vitamin B12 The Optimal Vitamin B12 Dosage for Kids, Pregnancy, and Seniors Check out the Updated Vitamin B12 Recommendations Infographic for my latest B12 recommendations
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