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Risk factors include older age, gastrointestinal disorders, vegan diets, or use of certain medications like metformin or PPIs
Last reviewed: 02 Jul 2026 With Superdrug Online Doctor you can message our Doctors for FREE via your patient account.
0.30-0.39%: At this point, you may be unconscious and your potential for death increases
Mutation update and review of severe methylenetetrahydrofolate reductase deficiency
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