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Its thought that up to 90% of people following these diets have a deficiency (2Trusted Source, 3Trusted Source)
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Practices that offer B12 injections to every walk-in without any laboratory assessment are operating on a wellness-mill model rather than a medically supervised one
Recommended Dosage and Types of Vitamin B12 Supplements The UK Reference Nutrient Intake (RNI) for vitamin B12 is 1.5 micrograms per day for adults, including during pregnancy
In some centres, holotranscobalamin (active B12) may be available as an alternative test
For borderline results, additional testing with holotranscobalamin or methylmalonic acid/homocysteine levels may be appropriate
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